I am trying to populate a drop down list in the footer row of a grid view. my mark up is as follows:
<asp:Label ID="lblGrdImages" runat="server" ></asp:Label>
<asp:GridView
ID="grdImages"
runat="server"
AllowPaging="true"
ShowFooter="true"
PageSize="5"
AutoGenerateColumns="false"
OnPageIndexChanging="grdImages_PageIndexChanging"
OnRowCancelingEdit="grdImages_RowCancelingEdit"
OnRowCommand="grdImages_RowCommand"
OnRowEditing="grdImages_RowEditing"
OnRowUpdating="grdImages_RowUpdating"
OnRowDeleting="grdImages_RowDeleting"
EmptyDataText="No Data Available at this Time" >
<AlternatingRowStyle BackColor="White" ForeColor="#284775"></AlternatingRowStyle>
<Columns>
<asp:TemplateField AccessibleHeaderText="Product ID" HeaderText="Product ID" FooterText="Product ID">
<ItemTemplate>
<asp:Label ID="lblProdId" runat="server" Text='<%# Eval("pi.ProductId") %>' ></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:Label ID="lblEditProdId" runat="server" Text='<%# Eval("pi.ProductId") %>' ></asp:Label>
</EditItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="lstAddProdId" runat="server" AppendDataBoundItems="true" >
<asp:ListItem>Select a product</asp:ListItem>
</asp:DropDownList>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField AccessibleHeaderText="Product Main Image" FooterText="Product Main Image" HeaderText="Product Main Image">
<ItemTemplate>
<asp:Label ID="lblMainImgId" runat="server" Text='<%# Eval("pi.ImageId") %>' ></asp:Label>
<asp:Image ID="imgMain" runat="server" Height="250" Width="250" ImageUrl='<%# Eval("pi.ImagePath") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:FileUpload ID="flupMain" runat="server" AllowMultiple="false" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField AccessibleHeaderText="Supporting Images" FooterText="Supporting Images" HeaderText="Supporting Images">
<ItemTemplate>
<h2>repeater here</h2>
</ItemTemplate>
<FooterTemplate>
<asp:FileUpload ID="flupExtra" runat="server" AllowMultiple="true" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Edit">
<ItemTemplate>
<asp:LinkButton ID="btnEdit" Text="Edit" runat="server" CommandName="Edit" />
<br />
<span onclick="return confirm('Are you sure you want to declare this product Discontinued?')">
<asp:LinkButton ID="btnDelete" Text="Delete" runat="server" CommandName="Delete" />
</span>
</ItemTemplate>
<EditItemTemplate>
<asp:LinkButton ID="btnUpdate" Text="Update" runat="server" CommandName="Update" />
<br />
<asp:LinkButton ID="btnCancel" Text="Cancel" runat="server" CommandName="Cancel" />
</EditItemTemplate>
<FooterTemplate>
<asp:Button ID="btnAddRecord" runat="server" Text="Add" CommandName="Add"></asp:Button>
</FooterTemplate>
</asp:TemplateField>
</Columns>
<EditRowStyle BackColor="#999999"></EditRowStyle>
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White"></FooterStyle>
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White"></HeaderStyle>
<PagerStyle HorizontalAlign="Center" BackColor="#284775" ForeColor="White"></PagerStyle>
<RowStyle BackColor="#F7F6F3" ForeColor="#333333"></RowStyle>
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333"></SelectedRowStyle>
<SortedAscendingCellStyle BackColor="#E9E7E2"></SortedAscendingCellStyle>
<SortedAscendingHeaderStyle BackColor="#506C8C"></SortedAscendingHeaderStyle>
<SortedDescendingCellStyle BackColor="#FFFDF8"></SortedDescendingCellStyle>
<SortedDescendingHeaderStyle BackColor="#6F8DAE"></SortedDescendingHeaderStyle>
</asp:GridView>
My code behind function to populate the drop down list:
protected void lstProducts()
{
// find dropdownlist in the footer row of the gridview
DropDownList prods = (DropDownList)grdImages.FooterRow.FindControl("lstAddProdId");
// define ado.net objects
SqlConnection con = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand("ProductDetails.bnc_ProductImages", con);
cmd.CommandType = CommandType.StoredProcedure;
SqlDataReader reader;
// define the sp parameters
cmd.Parameters.Add(new SqlParameter("#Status", SqlDbType.VarChar, 50));
cmd.Parameters["#Status"].Value = "LstProds";
try
{
con.Open(); // try to connect to db.
reader = cmd.ExecuteReader(); // execut the reader
while (reader.Read())
{
ListItem item = new ListItem(); // create listitem
item.Text = reader["p.ProductName"].ToString(); // add product name to item text
item.Value = reader["p.ProductId"].ToString(); // add productId to item value
prods.Items.Add(item); // populate dropdown list.
}
}
catch (Exception err)
{
lblGrdImages.Text = err.Message; // display error message in a label
}
finally
{
con.Close(); // close the connection.
}
}
When I try to run it I get the following error:
An exception of type 'System.NullReferenceException' occurred in App_Web_su5rfbqf.dll but was not handled in user code
I am unsure as to why I am getting this exception. I am assuming it is not able to find the control in the grid view footer row but I do not know why. It may be a silly mistake somewhere but I cannot figure out what I should do
EDIT I am getting the error on this line of lstProducts():
DropDownList prods = (DropDownList)grdImages.FooterRow.FindControl("lstAddProdId");
You have to set Datasource to your gridView first.The error you are getting is at grdImages.FooterRow=null.Try populating the grdImages first and then try to access it.
Here is a similar example that does the same
<asp:GridView ID="GridView1" HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White"
RowStyle-BackColor="#A1DCF2" AlternatingRowStyle-BackColor="White" AlternatingRowStyle-ForeColor="#000"
runat="server" AutoGenerateColumns="false" ShowFooter = "true" OnDataBound = "OnDataBound">
<Columns>
<asp:TemplateField HeaderText = "Name">
<ItemTemplate>
<asp:Label ID="lblName" runat="server" Text='<%# Eval("Name") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtName" runat="server" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText = "Country">
<ItemTemplate>
<asp:Label ID="lblName" runat="server" Text='<%# Eval("Country") %>' />
</ItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="ddlCountries" runat="server">
</asp:DropDownList>
</FooterTemplate>
</asp:TemplateField>
</Columns>
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
DataTable dt = new DataTable();
dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id"), new DataColumn("Name"), new DataColumn("Country") });
dt.Rows.Add(1, "John Hammond", "United States");
dt.Rows.Add(2, "Mudassar Khan", "India");
dt.Rows.Add(3, "Suzanne Mathews", "France");
dt.Rows.Add(4, "Robert Schidner", "Russia");
GridView1.DataSource = dt;
GridView1.DataBind();
}
}
protected void OnDataBound(object sender, EventArgs e)
{
DropDownList ddlCountries = GridView1.FooterRow.FindControl("ddlCountries") as DropDownList;
}
Related
I have a grid view control in my page that indexes all the Lecture Contents. I have added a Text Box control and a Link Button. But for the Lectures that have no Content yet, the Grid View does not appear.
Have tried many references, as a result the footer has appeared but I am not able to insert data using the Controls in the footer.
My main objective is to make the Controls behave same in both scenarios.
Here is the Grid View Code.
`<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" EmptyDataText="No Contents found for this lecture." ShowFooter="true" HeaderStyle-Wrap="false" Width="70%" CssClass="Grid" AlternatingRowStyle-CssClass="alt" PagerStyle-CssClass="pgr" OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:TemplateField HeaderText=" LectureID " SortExpression="lecc_id">
<ItemTemplate>
<asp:Label ID="lbllecc_id" runat="server" Text='<%# Bind("lecc_id") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:Label ID="lbllecc_id" runat="server" T`enter code here`ext="Create New">
</asp:Label>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText=" Content " SortExpression="lecc_contents">
<EditItemTemplate>
<asp:TextBox ID="tblecc_contents" runat="server" Text='<%# Bind("lecc_contents") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lbllecc_contents" runat="server" Text='<%# Bind("lecc_contents") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtcontent" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfcontent" runat="server" ErrorMessage="Content field cannot be blank." ControlToValidate="txtcontent" Text="*" ForeColor="Red"></asp:RequiredFieldValidator>
<asp:LinkButton ID="createcontent" runat="server" OnClick="createcontent" CssClass="btn-sm btn-default">Insert Content</asp:LinkButton>
</FooterTemplate>
</asp:TemplateField>
</Columns>
</EmptyDataTemplate>
<FooterStyle BackColor="#CCCC99" />
<HeaderStyle BackColor="#6B696B" Font-Bold="True" ForeColor="White" Font-Size="17px" />
<PagerStyle BackColor="#F7F7DE" ForeColor="Black" HorizontalAlign="Right" />
<RowStyle BackColor="#F7F7DE" Font-Bold="False" Font-Size="14px" />
<SelectedRowStyle BackColor="#CE5D5A" Font-Bold="True" ForeColor="White" />
<SortedAscendingCellStyle BackColor="#FBFBF2" />
<SortedAscendingHeaderStyle BackColor="#848384" />
<SortedDescendingCellStyle BackColor="#EAEAD3" />
<SortedDescendingHeaderStyle BackColor="#575357" />
</asp:GridView>`
and the code behind functions for grid view.
`protected void Page_Load(object sender, EventArgs e){
if (Session["fac_username"] != null)
{
String username = Convert.ToString(Session["fac_username"]);
if (!IsPostBack)
{
BindGridViewData();
}
}
else
{
Response.Redirect("~/Account/Login.aspx");
}
}protected void BindGridViewData(){
int lecID = Convert.ToInt32(Session["lecID"]);
GridView1.DataSource = DataAccessLayer.getAllContents(lecID);
GridView1.DataBind();} protected void GridView1_SelectedIndexChanged(object sender, EventArgs e){
}
protected void createcontent(object sender, EventArgs e){
int lecID = Convert.ToInt32(Session["lecID"]);
con.Open();
SqlCommand command = new SqlCommand("insert into uni_lect_content(lecc_id, lecc_contents) values(#lecc_id, #lecc_contents)", con);
command.Parameters.AddWithValue("#lecc_id", lecID);
command.Parameters.AddWithValue("#lecc_contents", ((TextBox)GridView1.FooterRow.FindControl("txtcontent")).Text);
command.ExecuteNonQuery();
con.Close();
lblmsg.Text = "New Course Successfully Created..!";}`
DataAccessLayer class's getAllConents() method is here.
`public class AllContents
{
public long lecc_id { get; set; }
public string lecc_contents { get; set; }
}
public class DataAccessLayer
{
public static List<AllContents> getAllContents( int lecID){
List<AllContents> listAll = new List<AllContents>();
string cs = ConfigurationManager.ConnectionStrings["ILMSConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(cs))
{
SqlCommand com = new SqlCommand("select lecc_id, lecc_contents from uni_lect_content, uni_lectures, uni_offered_courses where uni_lect_content.lecc_id = uni_lectures.lec_id and uni_lectures.cours_offer_id = uni_offered_courses.cours_offer_id and lecc_id = '"+lecID+"'", con);
con.Open();
SqlDataReader rdr = com.ExecuteReader();
while (rdr.Read())
{
AllContents obj = new AllContents();
obj.lecc_id = Convert.ToInt32(rdr["lecc_id"]);
obj.lecc_contents = rdr["lecc_contents"].ToString();
listAll.Add(obj);
}
}
return listAll;
}`
Help me out of this situation.
Thanks in advance.
FRONT END GRDIVIEW
<asp:GridView ID="grdview" ShowFooter="true" OnRowEditing="grdview_RowEditing" OnRowCancelingEdit="grdview_RowCancelingEdit" OnRowCommand="grdview_RowCommand" OnRowUpdating="grdview_RowUpdating" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:TemplateField HeaderText="SR No.">
<ItemTemplate>
<%#Container.DataItemIndex+1 %>
<asp:Label ID="lblid" runat="server" Text='<%#Eval("Id") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" HeaderText="Emp Name">
<ItemTemplate>
<asp:Label ID="elblempname" runat="server" Text='<%#Eval("EmpName") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="etxtempname" runat="server" Text='<%#Eval("EmpName") %>'></asp:TextBox>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="ftxtempname" runat="server" ></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" HeaderText="Emp No">
<ItemTemplate>
<asp:Label ID="elblempno" runat="server" Text='<%#Eval("EmpNo") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="etxtempno" runat="server" Text='<%#Eval("EmpNo") %>'></asp:TextBox>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="ftxtempno" runat="server" ></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" HeaderText="Email">
<ItemTemplate>
<asp:Label ID="elblempemail" runat="server" Text='<%#Eval("Email_Id") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="etxtempemail" runat="server" Text='<%#Eval("Email_Id") %>'></asp:TextBox>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="ftxtempemail" runat="server" ></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" HeaderText="Age">
<ItemTemplate>
<asp:Label ID="elblempage" runat="server" Text='<%#Eval("Age") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="etxtempage" runat="server" Text='<%#Eval("Age") %>'></asp:TextBox>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="ftxtempage" runat="server" ></asp:TextBox>
<asp:Button ID="btnAdd" CommandName="AddNew" runat="server" Text="Add" />
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
BACKEND CODE
ds.Tables[0].Rows.Add(ds.Tables[0].NewRow());
grdview.DataSource = ds;
grdview.DataBind();
int columncount = grdview.Rows[0].Cells.Count;
grdview.Rows[0].Cells.Clear();
grdview.Rows[0].Cells.Add(new TableCell());
grdview.Rows[0].Cells[0].ColumnSpan = columncount;
grdview.Rows[0].Cells[0].Text = "No Records Found";
if (e.CommandName == "AddNew")
{
TextBox ftxtempname = (TextBox)grdview.FooterRow.FindControl("ftxtempname");
TextBox ftxtempno = (TextBox)grdview.FooterRow.FindControl("ftxtempno");
TextBox ftxtempemail = (TextBox)grdview.FooterRow.FindControl("ftxtempemail");
TextBox ftxtempage = (TextBox)grdview.FooterRow.FindControl("ftxtempage");
using (con)
{
SqlCommand cmd = new SqlCommand("usp_add_upd_emptb", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("#EmpName", ftxtempname.Text);
cmd.Parameters.AddWithValue("#EmpNo", ftxtempno.Text);
cmd.Parameters.AddWithValue("#Desig", ftxtempage.Text);
cmd.Parameters.AddWithValue("#Email", ftxtempemail.Text);
con.Open();
cmd.ExecuteNonQuery();
}
This is a working complete code.
I am extracting data from database in gridview, where I have given a link button "Edit" for editing the data of that row. However while editing , one of the columns(YEAR) of my gridview becomes a dropdown list. While fetching the data from database, the Column "Year" consists of label and in edit mode it gets changed to dropdownlist. Moreover I added a condition to make the link buttons appear/disappear based on the value of the Label "Year". When I edit the particular row it throws an error because as soon as edit command is called it converts the column into dropdownlist however the row_databound searches for label. It shows "Object not set to an instance....." PLease help
Aspx
<asp:GridView ID="gv1" runat="server" AutoGenerateColumns="False" BackColor="White" BorderColor="#3366CC" BorderStyle="None" BorderWidth="1px" CellPadding="4" DataSourceID="SqlDataSource2" OnRowDataBound="gv1_RowDataBound" OnRowUpdating="gv1_RowUpdating" DataKeyNames="tid" CssClass="auto-style1" Width="694px">
<Columns>
<asp:TemplateField HeaderText="Sr No">
<ItemTemplate>
<%#Container.DataItemIndex+1 %>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="tid" SortExpression="tid" Visible="false">
<ItemTemplate>
<asp:Label ID="lblID" runat="server" Text='<%# Bind("tid") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Title" SortExpression="title">
<EditItemTemplate>
<asp:TextBox ID="txtTitle1" runat="server" Text='<%# Bind("title") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblTitle" runat="server" Text='<%# Bind("title") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Category" SortExpression="category">
<ItemTemplate>
<asp:Label ID="lblCategory" runat="server" Text='<%# Bind("category") %>'></asp:Label></ItemTemplate>
<EditItemTemplate>
<asp:RadioButtonList ID="rbtnlist" runat="server"><asp:ListItem Text="Soft Skills"></asp:ListItem><asp:ListItem Text="Technical Skills"></asp:ListItem></asp:RadioButtonList>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Announced at" SortExpression="dt">
<ItemTemplate>
<asp:Label ID="lblDt" runat="server" Text='<%# Bind("dt", "{0:dd/MMM/yyyy HH:mm tt}") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Year" SortExpression="year">
<EditItemTemplate>
<asp:DropDownList ID="ddlyr" runat="server"></asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblyr" runat="server" Text='<%# Bind("year") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="User Id" SortExpression="userid">
<ItemTemplate>
<asp:Label ID="lblUid" runat="server" Text='<%# Bind("userid") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="btndel" runat="server" CausesValidation="False" CommandName="Delete" Text="Delete" OnClientClick="return isConfirm()" Visible="false"></asp:LinkButton>
<%--<asp:LinkButton ID="btnmail" runat="server" CausesValidation="False" OnClientClick="return isConfirm()" Text="Send Mail" Visible="false"></asp:LinkButton>--%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ShowHeader="False">
<EditItemTemplate>
<asp:LinkButton ID="btnupdte" runat="server" CausesValidation="True" CommandName="Update" Text="Update"></asp:LinkButton>
<asp:LinkButton ID="btncncl" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel"></asp:LinkButton>
</EditItemTemplate>
<ItemTemplate>
<asp:LinkButton ID="btnedit" runat="server" CausesValidation="False" CommandName="Edit" Text="Edit" Visible="false"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ShowHeader="false">
<ItemTemplate>
<asp:LinkButton ID="btnmail" runat="server" CausesValidation="False" OnClientClick="return isConfirm()" Text="Send Mail" Visible="false"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#99CCCC" ForeColor="#003399" />
<HeaderStyle BackColor="#003399" Font-Bold="True" ForeColor="#CCCCFF" />
<PagerStyle ForeColor="#003399" HorizontalAlign="Left" BackColor="#99CCCC" />
<RowStyle BackColor="White" ForeColor="#003399" />
<SelectedRowStyle BackColor="#009999" Font-Bold="True" ForeColor="#CCFF99" />
<SortedAscendingCellStyle BackColor="#EDF6F6" />
<SortedAscendingHeaderStyle BackColor="#0D4AC4" />
<SortedDescendingCellStyle BackColor="#D6DFDF" />
<SortedDescendingHeaderStyle BackColor="#002876" />
</asp:GridView>
c#
protected void gv1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
Label lbly = (Label)e.Row.FindControl("lblyr");
if (lbly.Text == DateTime.Now.Year.ToString() || lbly.Text == ((DateTime.Now.Year)-1).ToString())
{
LinkButton btedt = (LinkButton)e.Row.FindControl("btnedit");
LinkButton btdel = (LinkButton)e.Row.FindControl("btndel");
LinkButton btsm = (LinkButton)e.Row.FindControl("btnmail");
btdel.Visible = true;
btedt.Visible = true;
btsm.Visible = true;
}
if ((e.Row.RowState & DataControlRowState.Edit) > 0) {
RadioButtonList rbtnlist = (RadioButtonList)e.Row.FindControl("rbtnlist");
DropDownList ddlist = (DropDownList)e.Row.FindControl("ddlyr");
for (int i = (DateTime.Now.Year); i >= ((DateTime.Now.Year)-1) ; i--)
{
ddlist.Items.Add(new ListItem(i.ToString(), i.ToString()));
}
ddlist.DataBind();
rbtnlist.DataBind();
}
}
}
I am assuming that you are binding your grid with a DataTable with colum name "Year". Try below code where dt refers to your Datatable:
protected void gv1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
int rowno = e.Row.DataItemIndex;
//Suppose dt is DataTable to which you are binding your grid
//and year is the column name within this datatable
string year = Convert.ToString(dt.Rows[e.Row.DataItemIndex]["year"]);
if (year == DateTime.Now.Year.ToString() || year == ((DateTime.Now.Year) - 1).ToString())
{
LinkButton btedt = (LinkButton)e.Row.FindControl("btnedit");
LinkButton btdel = (LinkButton)e.Row.FindControl("btndel");
LinkButton btsm = (LinkButton)e.Row.FindControl("btnmail");
btdel.Visible = true;
btedt.Visible = true;
btsm.Visible = true;
}
if ((e.Row.RowState & DataControlRowState.Edit) > 0)
{
RadioButtonList rbtnlist = (RadioButtonList)e.Row.FindControl("rbtnlist");
DropDownList ddlist = (DropDownList)e.Row.FindControl("ddlyr");
for (int i = (DateTime.Now.Year); i >= ((DateTime.Now.Year) - 1); i--)
{
ddlist.Items.Add(new ListItem(i.ToString(), i.ToString()));
}
ddlist.DataBind();
rbtnlist.DataBind();
}
}
all my commands are working properly but the problem is
after I execute my Search command then I click the select link button on my GridView, My Gridview is refreshing and select the first row in the grid view and not the one that I searched.. example: first I run the Index Page then the GridView get all the record from database(10 populated record) and show to the index.. (No Problem)
then I type the firstname of the user to search it then i click the search button then the it filtered and show to gridview again here's the image
then I click the "Select" link button from Gridview and this what happened
that's what happened .. I clicked the select link button on "marcy's record" then it refreshed and get the value of RASI's Record on the first row...
but when my click select without searching it worked just fine
here's my code for search button
string strconn;
strconn = "select * from User_TBL_DB where (Firstname like '%'+#search+'%' and Middlename like '%'+#search2+'%' and Lastname like '%'+#search3+'%')";
SqlCommand xp = new SqlCommand(strconn, conn);
xp.Parameters.Add("#search", SqlDbType.NVarChar).Value = firstname_search.Text;
xp.Parameters.Add("#search2", SqlDbType.NVarChar).Value = middlename_search.Text;
xp.Parameters.Add("#search3", SqlDbType.NVarChar).Value = lastname_search.Text;
conn.Open();
xp.ExecuteNonQuery();
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = xp;
DataSet ds = new DataSet();
da.Fill(ds, "Name");
GridView1.DataSource = ds;
GridView1.DataBind();
conn.Close();
and here's my code for select link button on gridview
row = GridView1.SelectedRow;
firstname_tb.Text = (row.FindControl("lbl_Firstname") as Label).Text;
middlename_tb.Text = (row.FindControl("lbl_Middlename") as Label).Text;
lastname_tb.Text = (row.FindControl("lbl_Lastname") as Label).Text;
age_tb.Text = (row.FindControl("lbl_Age") as Label).Text;
id_tb.Text = (row.FindControl("lbl_ID") as Label).Text;
string gender = (row.FindControl("lbl_Sex") as Label).Text;
if (gender == "FEMALE")
{
female_rb.Checked = true;
male_rb.Checked = false;
}
else
{
male_rb.Checked = true;
female_rb.Checked = false;
}
and here's my codes for ASP on Gridview
<asp:GridView ID="GridView1" runat="server" BackColor="White" BorderColor="#3366CC"
BorderStyle="None" BorderWidth="1px" CellPadding="4" AutoGenerateColumns="False"
onselectedindexchanged="GridView1_SelectedIndexChanged" Width="581px"
onrowcommand="GridView1_RowCommand"
onselectedindexchanging="GridView1_SelectedIndexChanging">
<Columns>
<%--<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="Select_button" CommandArgument ='<%# Eval("ID") %>' CommandName="SelectRow" ForeColor="#8C4510" runat="server">Select</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>--%>
<asp:CommandField ShowSelectButton="True"></asp:CommandField>
<asp:TemplateField HeaderText="Firstname" SortExpression="Firstname">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Firstname") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lbl_Firstname" runat="server" Text='<%# Bind("Firstname") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Middlename" SortExpression="Middlename">
<EditItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Middlename") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lbl_Middlename" runat="server" Text='<%# Bind("Middlename") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Lastname" SortExpression="Lastname">
<EditItemTemplate>
<asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("Lastname") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lbl_Lastname" runat="server" Text='<%# Bind("Lastname") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Age" SortExpression="Age">
<EditItemTemplate>
<asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("Age") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lbl_Age" runat="server" Text='<%# Bind("Age") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Sex" SortExpression="Sex">
<EditItemTemplate>
<asp:TextBox ID="TextBox5" runat="server" Text='<%# Bind("Sex") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lbl_Sex" runat="server" Text='<%# Bind("Sex") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="ID" SortExpression="ID">
<EditItemTemplate>
<asp:TextBox ID="TextBox6" runat="server" Text='<%# Bind("ID") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lbl_ID" runat="server" Text='<%# Bind("ID") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#99CCCC" ForeColor="#003399" />
<HeaderStyle BackColor="#003399" Font-Bold="True"
ForeColor="#CCCCFF" />
<PagerStyle BackColor="#99CCCC" ForeColor="#003399"
HorizontalAlign="Left" />
<RowStyle BackColor="White" ForeColor="#003399" />
<SelectedRowStyle BackColor="#009999" Font-Bold="True"
ForeColor="#CCFF99" />
<SortedAscendingCellStyle BackColor="#EDF6F6" />
<SortedAscendingHeaderStyle BackColor="#0D4AC4" />
<SortedDescendingCellStyle BackColor="#D6DFDF" />
<SortedDescendingHeaderStyle BackColor="#002876" />
</asp:GridView>
i connect it to sqlDatasource1 and disconnect it and leave the code as is. I used Showselectbutton="true"
that's my Problem hope you can help me thank you very much
I am trying to pass RegionProjectID column of my grid from query string when ever a user will click on the RegionProjectName field on the grid. I had made RegionProjectname as hyperlink and below you can find the Code also. But this is not working . Please suggest me or help that why it is not working. The pagin is also enabled in my grid view.
<asp:GridView ID="ResultGridView" runat="server" AutoGenerateColumns="False" ShowFooter="true"
DataKeyNames="RegionProjectID"
AllowPaging="True"
CellPadding="3"
OnPageIndexChanging="ResultGridView_PageIndexChanging"
OnRowDeleting="ResultGridView_RowDeleting"
CssClass="mGrid"
OnRowEditing="ResultGridView_RowEditing"
OnRowUpdating="ResultGridView_RowUpdating"
OnRowCancelingEdit="ResultGridView_RowCancelingEdit"
PageSize="15" BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px" CellSpacing="2"
OnRowCommand="ResultGridView_RowCommand" >
<Columns>
<asp:BoundField DataField="RegionProjectID" HeaderText="Region ID" InsertVisible="False"
ReadOnly="True" SortExpression="RegionProjectID" Visible="false" />
<asp:TemplateField HeaderText="Region Name" SortExpression="RegionProjectName">
<EditItemTemplate>
<asp:TextBox ID="txtRegion" Width="250px" runat="server" Text='<%# Bind("RegionProjectName") %>'></asp:TextBox>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtRegion1" runat="server" Width="250px"></asp:TextBox>
</FooterTemplate>
<ItemTemplate>
<asp:LinkButton ID="LinkButton3" CommandName="Details" CommandArgument='<%# Eval("RegionProjectID") %>' Text='<%# Bind("RegionProjectName") %>' runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Edit" ShowHeader="False">
<EditItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="True" CommandName="Update" Text="Update"></asp:LinkButton>
<asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel"></asp:LinkButton>
</EditItemTemplate>
<FooterTemplate>
<asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="AddNew" Text="Add New"></asp:LinkButton>
</FooterTemplate>
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Edit" Text="Edit"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField HeaderText="Delete" ShowDeleteButton="True" ShowHeader="True" />
<%-- <asp:CommandField HeaderText="Select" ShowSelectButton="True" ShowHeader="True"/> --%>
</Columns>
<RowStyle BackColor="#FFF7E7" ForeColor="#8C4510" />
<FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />
<PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />
<%--<SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />--%>
<HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />
</asp:GridView>`
protected void ResultGridView_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Details")
{
Server.Transfer("Default3.aspx?ID=" + e.CommandArgument.ToString());
}
if (e.CommandName.Equals("AddNew"))
{
TextBox txtRegion1 = (TextBox)ResultGridView.FooterRow.FindControl("txtRegion1");
TextBox txtNatureOFWork1 = (TextBox)ResultGridView.FooterRow.FindControl("txtNatureOFWork1");
if (txtRegion1.Text != "")
{
cmd.Connection = conn;
cmd.CommandText = "INSERT INTO RegionAndProjectInfo(RegionProjectName, NatureOFWorkID ) Values('" + txtRegion1.Text + "', '" + ddlnatureOfWork.SelectedValue.ToString() + "')";
conn.Open();
cmd.ExecuteNonQuery();
}
FillVendorGrid();
conn.Close();
}
}
You must use
Response.Redirect("Default3.aspx?ID=" + e.CommandArgument.ToString());
instead of Server Transfer, cause Server Transfer does a different thing compared to Response.Redirect.
The Server.Transfer method also has a second parameter—"preserveForm". If you set this to True, using a statement such as
`Server.Transfer("Default3.aspx?ID=" + e.CommandArgument.ToString()`, True);
, the existing query string and any form variables will still be available to the page you are transferring to.
its more of a file transfer, instead of a redirect
http://msdn.microsoft.com/en-us/library/ms525800%28v=vs.90%29.aspx
<ItemTemplate>
<asp:hyperlink id="LinkButton3" navigateurl='<%# "Default3.aspx?ID=" + Eval("RegionProjectID")%>' text='<%# Bind("RegionProjectName")%>' runat="server" />
</ItemTemplate>
I had updated the itemtemplate of Regionprojectname as above and now getting query string .
HTML Page:
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="true">
<ContentTemplate>
<asp:GridView ID="Grd_Threshold" runat="server" CellPadding="4" ForeColor="#333333"
GridLines="Both" AutoGenerateColumns="false" EmptyDataText="No Records." PageSize="8"
AllowPaging="true" OnPageIndexChanging="Grd_Threshold_PageIndexChanging" OnRowCommand="Grd_Threshold_RowCommand"
DataKeyNames="ID" AutoGenerateEditButton="true" OnRowCancelingEdit="Grd_Threshold_RowCancelingEdit" OnRowEditing="Grd_Threshold_RowEditing"
OnRowUpdating="Grd_Threshold_RowUpdating">
<Columns>
<asp:TemplateField HeaderText="No.">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("ID") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Name" ItemStyle-Width="150px">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("CLNAME") + ", " + Eval("CFNAME") +" " +Eval("CMNAME")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Doctor" ItemStyle-Width="150px">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("DOCTORNAME")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Item Name" ItemStyle-Width="150px">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("INAME")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Item Form" ItemStyle-Width="100px">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("IFORM")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Item Strength" ItemStyle-Width="100px">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("ISTRG")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Order Date" ItemStyle-Width="100px">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("ORDERDATE")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Price" ItemStyle-Width="80px">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("PRICE")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Quantity" ItemStyle-Width="80px">
<EditItemTemplate>
<asp:TextBox ID="Txt_Qty" runat="server" Width="50px" Text='<%# Eval("QTY")%>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("QTY")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="User" ItemStyle-Width="100px">
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Eval("USERID")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<RowStyle BackColor="#E3EAEB" />
<FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#7C6F57" />
<AlternatingRowStyle BackColor="White" />
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
CS Code:
protected void Page_Load(object sender, EventArgs e)
{
try
{
Title = "Dashboard";
if (!Master.Page.IsPostBackEventControlRegistered)
{
BindGrid();
}
}
catch (Exception ex)
{
Common.WriteLog(ex);
}
}
private void BindGrid()
{
try
{
if (SessionUtility.DashboardRecords == null || SessionUtility.DashboardRecords.Rows.Count == 0)
{
string WebServiceUrl = SessionUtility.WebServiceUrl + "/GetAllOrders/";
JsonArrayCollection ReqResponse = Common.GetWebServiceResponse_MultipleValues(WebServiceUrl, "GET");
DataTable Patients = Common.ConvertJsonArrayObjectCollectionToDataTable(ReqResponse);
SessionUtility.DashboardRecords = Patients;
}
if (SessionUtility.UserRight != "1")
{
//Grd_Threshold.Columns[0].Visible = false;
Grd_Threshold.AutoGenerateEditButton = false;
}
else if (SessionUtility.UserRight == "1")
{
Grd_Threshold.AutoGenerateEditButton = true;
}
Grd_Threshold.DataSource = SessionUtility.DashboardRecords;
Grd_Threshold.DataBind();
UpdatePanel1.Update();
}
catch (Exception ex)
{
Common.WriteLog(ex);
}
}
Hi All,
In above written code only EDIT event is being fired & that is only once after that UPDATE,CANCEL no event is being fired. What am i doing wrong?All I want to do is change the GridRow Color on the basis of the value entered in QTY field.
I figured out the problem. The event was not firing because of the same IDs that i had given to the Label in each row. Hope this helpful to someone.
Not sure about your use of IsPostBackEventControlRegistered - I havent seen it used before but it seems that probably you are wiping out your update event by DataBind() every time in Page_Load().
Page_Load is fired every time the page loads which is then changing what the page is doing by resetting the grid.
Try wrapping the control in:
if(!IsPostBack)
{
// bind
}
so that it only does this on the first page load.