I have a Gridview on which I have Edit option for editing the Row. I have written the code for Edit and Update but it is not getting updated and the row gets blank. I debugged the code and didn't got to know what was the exact problem. Please see the code for your ref and let me know what is the exact issue:-
Gridview aspx code:
<asp:GridView ID="grdPostData" runat="server" Width="100%" border="1" Style="border: 1px solid #E5E5E5;" CellPadding="3" AutoGenerateColumns="False"
AllowPaging="true" PageSize="4" CssClass="hoverTable" OnPageIndexChanging="grdPostData_PageIndexChanging" OnRowDataBound="grdPostData_RowDataBound"
OnRowDeleting="grdPostData_RowDeleting" DataKeyNames="Id" OnRowEditing="grdPostData_RowEditing" OnRowUpdating="grdPostData_RowUpdating"
OnRowCancelingEdit="grdPostData_RowCancelingEdit" >
<AlternatingRowStyle BackColor="#CCCCCC" />
<Columns>
<asp:BoundField DataField="title" HeaderText="Title" ItemStyle-Width="30" ControlStyle-CssClass="k-grid td" />
<asp:BoundField DataField="description" HeaderText="Description" ItemStyle-Width="30" ControlStyle-CssClass="k-grid td" />
<asp:TemplateField HeaderText="Post Category" ItemStyle-Width="50">
<ItemTemplate>
<asp:DropDownList ID="ddlPostCategory" AppendDataBoundItems="true" runat="server"
AutoPostBack="false">
<%-- <asp:ListItem Text="Select" Value="0"></asp:ListItem>--%>
</asp:DropDownList>
<asp:Label ID="lblId" runat="server" Text='<%# Eval("Id") %>' > </asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="active" HeaderText="Active" ItemStyle-Width="30" ControlStyle-CssClass="k-grid td" />
<asp:TemplateField HeaderText="Action" HeaderStyle-Width="15%">
<ItemTemplate>
<asp:ImageButton ID="btnDelete" AlternateText="Delete" ImageUrl="~/images/delete.png" runat="server" Width="15" Height="15" CausesValidation="false" OnClientClick="return confirm('Are you sure you want to delete this record?')" />
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ButtonType="Image" ItemStyle-Width="15" EditImageUrl="~/images/edit.png" ShowEditButton="True" ControlStyle-Width="15" ControlStyle-Height="15" CancelImageUrl="~/images/close.png" UpdateImageUrl="~/images/update.png">
<ControlStyle Height="20px" Width="20px"></ControlStyle>
</asp:CommandField>
</Columns>
</asp:GridView>
Also see the CS code:
protected void grdPostData_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
bool IsUpdated = false;
//getting key value, row id
int Id = Convert.ToInt32(grdPostData.DataKeys[e.RowIndex].Value.ToString());
//get all the row field detail here by replacing id's in FindControl("")..
GridViewRow row = grdPostData.Rows[e.RowIndex];
// DropDownList ddlPostlistcategory = ((DropDownList)(row.Cells[0].Controls[0]));
TextBox txtPostTitle = ((TextBox)(row.Cells[0].Controls[0]));
TextBox txtPostdesc = ((TextBox)(row.Cells[1].Controls[0]));
TextBox ddlActive = ((TextBox)(row.Cells[2].Controls[0]));
using (SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DefaultCSRConnection"].ConnectionString))
{
SqlCommand cmd = new SqlCommand();
//cmd.CommandText = "UPDATE tbl_Pages SET page_title=#page_title,page_description=#page_description,meta_title=#meta_title,meta_keywords=#meta_keywords,meta_description=#meta_description,Active=#Active WHERE Id=#Id";
cmd.CommandText = "UPDATE tbl_Post SET title=#title, description=#description, active=#active WHERE Id=#Id";
cmd.Parameters.AddWithValue("#Id", Id);
cmd.Parameters.AddWithValue("#title", txtPostTitle.Text);
cmd.Parameters.AddWithValue("#description", txtPostdesc.Text);
cmd.Parameters.AddWithValue("#Active", Convert.ToInt32(ddlActiveInactive.SelectedValue));
cmd.Connection = conn;
conn.Open();
IsUpdated = cmd.ExecuteNonQuery() > 0;
conn.Close();
}
if (IsUpdated)
{
ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "alert('page updated sucessfully');window.location ='csrposts.aspx';", true);
BindGrid();
}
else
{
//Error while updating details
grdPostData.EditIndex = -1;
//bind gridview here..
grdPostData.DataBind();
}
}
protected void grdPostData_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
grdPostData.EditIndex = -1;
BindGrid();
}
Edited part of the code:-
protected void grdPostData_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
bool IsUpdated = false;
int Id = Convert.ToInt32(grdPostData.DataKeys[e.RowIndex].Value.ToString());
GridViewRow row = grdPostData.Rows[e.RowIndex];
DropDownList ddlPostCategory = (DropDownList)row.FindControl("ddlPostCategory");
//TextBox title = ((TextBox)(row.Cells[0].Controls[0]));
//TextBox description = ((TextBox)(row.Cells[1].Controls[0]));
TextBox title = (TextBox)row.FindControl("txtPostTitle");
TextBox description = (TextBox)row.FindControl("txtPostdesc");
DropDownList ddlActive = (DropDownList)row.FindControl("ddlActiveInactive");
using (SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DefaultCSRConnection"].ConnectionString))
{
SqlCommand cmd = new SqlCommand();
//cmd.CommandText = "UPDATE tbl_Pages SET page_title=#page_title,page_description=#page_description,meta_title=#meta_title,meta_keywords=#meta_keywords,meta_description=#meta_description,Active=#Active WHERE Id=#Id";
cmd.CommandText = "UPDATE tbl_post SET title=#title,description=#description,active=#active WHERE Id=#Id";
cmd.Parameters.AddWithValue("#Id", Id);
cmd.Parameters.AddWithValue("#title", txtPostTitle.Text);
cmd.Parameters.AddWithValue("#description", txtPostdesc.Text);
cmd.Parameters.AddWithValue("#active", Convert.ToInt32(ddlActiveInactive.SelectedValue));
cmd.Connection = conn;
conn.Open();
IsUpdated = cmd.ExecuteNonQuery() > 0;
conn.Close();
}
if (IsUpdated)
{
ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "alert('page updated sucessfully');window.location ='csrposts.aspx';", true);
BindGrid();
}
else
{
grdPostData.EditIndex = -1;
grdPostData.DataBind();
}
}
Code Is perfect just small mistake.
Change
TextBox ddlActive = ((TextBox)(row.Cells[2].Controls[0]));
To
TextBox ddlActive = ((TextBox)(row.Cells[3].Controls[0]));
You want to set value of Active which is 3rd control not 2nd.
If Your control is in TemplateField then you have find control from row
For DropDownList You need to try something like this:
DropDownList ddlPostCategory = (DropDownList)row.FindControl("ddlPostCategory") ;
Following Line will generate error
cmd.Parameters.AddWithValue("#Active", Convert.ToInt32(ddlActiveInactive.SelectedValue));
You need to find this control ddlActiveInactive from grid which you are missing
Don't Use AddWithValue it gives Unexpected Results Sometimes
SOURCE
EDIT:
protected void grdPostData_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
bool IsUpdated = false;
//getting key value, row id
int Id = Convert.ToInt32(grdPostData.DataKeys[e.RowIndex].Value.ToString());
//get all the row field detail here by replacing id's in FindControl("")..
GridViewRow row = grdPostData.Rows[e.RowIndex];
DropDownList ddlPostCategory = (DropDownList)row.FindControl("ddlPostCategory") ;
string PostTitle = row.Cells[0].Text;
string Postdesc = row.Cells[1].Text;
string Active = row.Cells[2].Text;
using (SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DefaultCSRConnection"].ConnectionString))
{
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "UPDATE tbl_Post SET title=#title, description=#description, active=#active WHERE Id=#Id";
cmd.Parameters.Add("#Id",SqlDbType.Int).Value=Id;
cmd.Parameters.Add("#title",SqlDbType.Varchar,100).Value=PostTitle ;
cmd.Parameters.Add("#description",SqlDbType.Varchar,200).Value= Postdesc ;
cmd.Parameters.Add("#Active",SqlDbType.Int).Value=Convert.ToInt32(Active);
cmd.Connection = conn;
conn.Open();
IsUpdated = cmd.ExecuteNonQuery() > 0;
conn.Close();
}
if (IsUpdated)
{
ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "alert('page updated sucessfully');window.location ='csrposts.aspx';", true);
BindGrid();
}
else
{
//Error while updating details
grdPostData.EditIndex = -1;
//bind gridview here..
//GET GDATA FROM DATABASE AND BIND TO GRID VIEW
}
}
Related
I'm noobie to this :)
I'm getting data from SQL Server in the page_load event handler, and that works fine with SqlDataReader.
I also added a DataTable. I want to use the data when selecting a dropdownlist.
This is my code:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string mainconn1 = ConfigurationManager.ConnectionStrings["SqlConnection1"].ConnectionString;
SqlConnection sqlconn1 = new SqlConnection(mainconn1);
string Sqlquery1 = "SELECT p.[Name], m.machineid,md.MachineNumber, md.HostName FROM [db].[dbo].[Machine] m INNER JOIN MachineDevice md ON md.MachineID = m.MachineID INNER JOIN property p ON m.PropertyID = p.PropertyID WHERE ([status] = '1') AND (md.DateTimeRetired IS NULL) ORDER BY md.MachineNumber";
SqlCommand sqlcomm1 = new SqlCommand(Sqlquery1, sqlconn1);
sqlconn1.Open();
SqlDataReader rd1 = sqlcomm1.ExecuteReader();
DataTable dt = new DataTable();
dt.Load(rd1);
}
}
And this:
protected void Ort_SelectedIndexChanged1(object sender, EventArgs e)
{
if (Ort.SelectedValue == "Stockholm")
{
// while (rd1.read)
// {
// Machine.DataSource = rd1;
// Machine.DataTextField = "MachineNumber";
// Machine.DataValueField = "MachineNumber";
// Machine.DataBind();
// Machine.Items.Insert(0, new ListItem("-Select Machine-", "0"));
// }
}
}
Is it possible to get data when selectindexchanged, or do I need to ask SQL Server again?
Thanks
Sure, say we have a drop down (combo box) of some cities, and when you select the city, we fill out a gird of hotels.
Is it possible to get data when selectindexchanged, or do I need to ask SQL Server again?
you could in some cases "persist" the data, but the cost is just as high as in most cases hitting the database again.
so, yes, it is standard fair to re-pull that data.
example:
this markup:
<h3>Select Hotel city</h3>
<asp:DropDownList ID="DropDownList1" runat="server"
Width="150px" Height="30px"
DataTextField="City"
AutoPostBack="true"
OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
</asp:DropDownList>
<br />
<br />
<asp:GridView ID="GVHotels" runat="server" CssClass="table table-hover"
DataKeyNames="ID" AutoGenerateColumns="false" Width="40%" OnRowDataBound="GVHotels_RowDataBound" >
<Columns>
<asp:BoundField DataField="FirstName" HeaderText="First Name" HeaderStyle-Width="100" />
<asp:BoundField DataField="LastName" HeaderText="Last Name" HeaderStyle-Width="100" />
<asp:BoundField DataField="HotelName" HeaderText="Hotel Name" HeaderStyle-Width="120"/>
<asp:BoundField DataField="City" HeaderText="City" />
<asp:BoundField DataField="Description" HeaderText="Province" />
<asp:TemplateField>
<ItemTemplate>
<button runat="server" id="cmdEditBooking"
type="button" class="btn myshadow"
onserverclick="cmdEditBooking_ServerClick">
<span class="glyphicon glyphicon-home"></span>View
</button>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
So, we have a combo box (dropdown list) of city to select, and then we display hotels from that city.
Code behind:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
LoadCombo();
}
void LoadCombo()
{
string strSQL = "SELECT City FROM City ORDER BY City";
SqlCommand cmdSQL = new SqlCommand(strSQL);
DropDownList1.DataSource = MyRstP(cmdSQL);
DropDownList1.DataBind();
DropDownList1.Items.Insert(0, new ListItem("Select City", ""));
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
if (DropDownList1.SelectedIndex >0)
{
string strSQL =
#"SELECT * FROM tblHotelsA
WHERE City = #City
ORDER BY HotelName";
SqlCommand cmdSQL = new SqlCommand(strSQL);
cmdSQL.Parameters.Add("#City", SqlDbType.NVarChar).Value = DropDownList1.Text;
GVHotels.DataSource = MyRstP(cmdSQL);
GVHotels.DataBind();
}
}
And both of above use this handy helper routine:
DataTable MyRstP(SqlCommand cmdSQL)
{
DataTable rstData = new DataTable();
using (SqlConnection conn = new SqlConnection(Properties.Settings.Default.TEST4))
{
using (cmdSQL)
{
cmdSQL.Connection = conn;
conn.Open();
rstData.Load(cmdSQL.ExecuteReader());
}
}
return rstData;
}
So, result:
I have a gridview where i upload file and save it to the server. There is something extra in it, like if the wrong file is uploaded we can again upload the same file and its updated version is been reflected on the gridview. Here is my code:-
protected void btnSubmit_Click(object sender, EventArgs e)
{
try
{
SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DefaultCSRConnection"].ConnectionString);
using (SqlCommand cmd = conn.CreateCommand())
{
if (fupreportfile.HasFiles)
{
int count = CheckFileExists(fupreportfile.PostedFile.FileName);
fupreportfile.SaveAs(Server.MapPath("~/ReportFolder/" + fupreportfile.PostedFile.FileName));
if (count > 0)
{
cmd.CommandText = " Update tbl_reports SET revision=#revision Where Id=#Id";
cmd.Parameters.AddWithValue("#Id", GetIdByFileName(fupreportfile.PostedFile.FileName));
cmd.Parameters.Add("#revision", SqlDbType.VarChar).Value = (count + 1).ToString();
cmd.Connection = conn;
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "alert('Reports updated sucessfully');window.location ='csrreports.aspx';", true);
}
else
{
conn.Open();
SqlCommand cmd1 = new SqlCommand("Insert into tbl_reports (NgoId,report_type_id,report_title,report_file,report_desc,revision) values(#NgoId, #report_type_id, #report_title,#report_file,#report_desc,#revision)", conn);
cmd1.Parameters.Add("#NgoId", SqlDbType.Int).Value = ddlNgoName.SelectedValue;
cmd1.Parameters.Add("#report_type_id", SqlDbType.Int).Value = ddlReportType.SelectedValue;
cmd1.Parameters.Add("#report_title", SqlDbType.NVarChar).Value = txtreporttitle.Text;
cmd1.Parameters.Add("#report_file", SqlDbType.VarChar).Value = fupreportfile.PostedFile.FileName;
cmd1.Parameters.Add("#report_desc", SqlDbType.NVarChar).Value = txtreportdescription.Text;
cmd1.Parameters.Add("#revision", SqlDbType.VarChar).Value = (count + 1).ToString();
cmd1.ExecuteNonQuery();
conn.Close();
ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "alert('Reports added sucessfully');window.location ='csrreports.aspx';", true);
}
}
}
}
catch (Exception ex)
{
throw ex;
}
}
For Checking if same file exits or not
public int CheckFileExists(string fileName)
{
try
{
using (SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DefaultCSRConnection"].ConnectionString))
{
SqlCommand cmd = new SqlCommand("SELECT COUNT(*) FROM tbl_reports WHERE report_file=#report_file", con);
cmd.Parameters.Add("#report_file", SqlDbType.VarChar).Value = fileName;
con.Open();
int count = (int)cmd.ExecuteScalar();
return count;
}
}
catch (Exception ex)
{
throw ex;
}
}
Now what I want is,
What to do in this scenario if I want to download the current file from the gridview.
Please suggest.
UPDATED GRIDVIEW CODE:-
<asp:GridView ID="grdReports"
runat="server"
Width="100%" border="1"
Style="border: 1px solid #E5E5E5;"
CellPadding="3"
OnPreRender="PreRenderGrid"
AutoGenerateColumns="False"
AllowPaging="true"
CssClass="hoverTable"
DataKeyNames="Id"
EmptyDataText="No Records Found!"
HeaderStyle-CssClass="k-grid td"
OnRowCommand="grdReports_RowCommand"
OnDataBound="grdReports_DataBound"
PageSize="10"
ShowFooter="false"
OnPageIndexChanging="grdReports_PageIndexChanging"
OnRowDeleting="grdReports_RowDeleting">
<AlternatingRowStyle CssClass="k-alt" />
<Columns>
<asp:TemplateField HeaderText="Select" ItemStyle-Width="5">
<ItemTemplate>
<asp:CheckBox ID="chkDelete" runat="server" onClick="Check_Click(this)" />
</ItemTemplate>
</asp:TemplateField>
<%--<asp:BoundField DataField="title" HeaderText="Report Type" ItemStyle-Width="30" />--%>
<asp:BoundField DataField="report_title" HeaderText="Report Title" ItemStyle-Width="30" />
<asp:BoundField DataField="report_file" HeaderText="Report File" ItemStyle-Width="30" />
<asp:BoundField DataField="report_desc" HeaderText="Report Description" HtmlEncode="false" ItemStyle-Width="30" />
<asp:BoundField DataField="revision" HeaderText="Report Revision" ItemStyle-Width="30" />
<asp:TemplateField HeaderText="Action" HeaderStyle-Width="5%" HeaderStyle-CssClass="k-grid td">
<ItemTemplate>
<asp:ImageButton ID="btnEdit" AlternateText="Edit" ImageUrl="~/images/edit.png" runat="server" Width="15" Height="15" CommandName="eEdit" CommandArgument='<%# Eval("Id") %>' CausesValidation="false" />
<asp:ImageButton ID="btnDelete" AlternateText="Delete" ImageUrl="~/images/delete.png" runat="server" Width="15" Height="15" CommandName="Delete" CommandArgument='<%# Eval("Id") %>' CausesValidation="false" OnClientClick="return confirm('Are you sure you want to delete this record?')" />
</ItemTemplate>
</asp:TemplateField>
</Columns></asp:GridView>
Follow the steps here
Add the TemplateField at the end as below.
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton ID="lnkDownload" Text="Download" CommandArgument='<%# Eval("report_file") %>' runat="server" OnClick="DownloadFile"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
2) C# code:-
protected void DownloadFile(object sender, EventArgs e)
{
try
{
string filePath = (sender as LinkButton).CommandArgument;
System.Net.WebClient req = new System.Net.WebClient();
HttpResponse response = HttpContext.Current.Response;
response.Clear();
response.ClearContent();
response.ClearHeaders();
response.Buffer = true;
response.AddHeader("Content-Disposition", "attachment;filename=\"" + Server.MapPath("~/ReportFolder/" + filePath) + "\"");
byte[] data = req.DownloadData(Server.MapPath("~/ReportFolder/" + filePath));
response.BinaryWrite(data);
response.End();
}
catch (Exception ex)
{
throw ex;
}
}
I have a gridview. I need to include a hyperlink to one of the columns so when the user clicks the link a popout should come with option to Edit and save. After the save the gridview should automatically get refreshed.
Following is my Gridview Code:
<asp:GridView ID="EmployeeGridView" runat="server" AutoGenerateColumns="False"
DataKeyNames="Emp_id" onrowcancelingedit="EmployeeGridView_RowCancelingEdit"
onrowediting="EmployeeGridView_RowEditing" onrowdeleting="EmployeeGridView_RowDeleting"
onrowupdating="EmployeeGridView_RowUpdating" Width="395px"
CellPadding="4" ForeColor="#333333" GridLines="None"
onrowdatabound="EmployeeGridView_RowDataBound" AllowPaging="True"
onpageindexchanging="EmployeeGridView_PageIndexChanging1" PageSize="5">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:TemplateField HeaderText = "Action">
<ItemTemplate>
<asp:CheckBox ID = "chkDelete" runat = "server" AutoPostBack="True"
oncheckedchanged="chkDelete_CheckedChanged" />
<br />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Sr.No">
<ItemTemplate>
<asp:Label ID = "lblID" runat = "server" Text = '<%#Container.DataItemIndex+1 %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Name">
<ItemTemplate>
<asp:Label ID = "lblEmpName" runat = "server" Text = '<%# Eval("Emp_name") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtempname" runat="server" Text='<%#Eval("Emp_name") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Experience">
<ItemTemplate>
<asp:Label ID = "lblEmpExp" runat = "server" Text = '<%# Eval("Emp_exp") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtempexp" runat="server" Text='<%#Eval("Emp_exp") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Address">
<ItemTemplate>
<asp:Label ID = "lblEmpAddress" runat = "server" Text = '<%# Eval("Emp_address") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtempaddress" runat="server" Text='<%#Eval("Emp_address") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowEditButton="true" ButtonType ="Button"
HeaderText="Edit" ControlStyle-BackColor= "#15524A" >
<ControlStyle BackColor="#15524A"></ControlStyle>
</asp:CommandField>
<asp:CommandField ShowDeleteButton="true" ButtonType="Button" HeaderText="Delete" />
</Columns>
<EditRowStyle BackColor="#7C6F57" />
<FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#E3EAEB" />
<SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#F8FAFA" />
<SortedAscendingHeaderStyle BackColor="#246B61" />
<SortedDescendingCellStyle BackColor="#D4DFE1" />
<SortedDescendingHeaderStyle BackColor="#15524A" />
</asp:GridView>
The code behind is :
public partial class _Default : System.Web.UI.Page
{
SqlConnection connstr = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
protected void EmployeeGridView_Sorting(object sender, GridViewSortEventArgs e)
{
Session["sortBy"] = e.SortExpression;
FillGrid();
}
protected void Page_Load(object sender, EventArgs e)
{
Session["sortBy"] = null;
if (!Page.IsPostBack)
{
FillGrid();
BindGrid();
}
}
public void FillGrid()
{
SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
con.Open();
SqlCommand cmd = new SqlCommand("GetEmployeeInfo", con);
SqlDataReader dr = cmd.ExecuteReader();//it reads froword only data from database
DataTable dt = new DataTable();//object of data table that uses to conatin whole data
dt.Load(dr);//Sql Data reader data load in data table it is DataTable Method.
EmployeeGridView.DataSource = dt;
EmployeeGridView.DataBind();
}
private void BindGrid()
{
string constr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand())
{
cmd.CommandText = "select Id, Name from tblFiles";
cmd.Connection = con;
con.Open();
GridView1.DataSource = cmd.ExecuteReader();
GridView1.DataBind();
con.Close();
}
}
}
protected void EmployeeGridView_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
EmployeeGridView.EditIndex = -1;
FillGrid();
}
protected void EmployeeGridView_RowEditing(object sender, GridViewEditEventArgs e)
{
EmployeeGridView.EditIndex = e.NewEditIndex;
FillGrid();
}
protected void EmployeeGridView_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
int empid = Convert.ToInt32(EmployeeGridView.DataKeys[e.RowIndex].Value.ToString());//Get Each Row unique value from DataKeyNames
string name = ((TextBox)EmployeeGridView.Rows[e.RowIndex].FindControl("txtempname")).Text;//get TextBox Value in EditItemTemplet that row is clicked
string experience = ((TextBox)EmployeeGridView.Rows[e.RowIndex].FindControl("txtempexp")).Text;
string address = ((TextBox)EmployeeGridView.Rows[e.RowIndex].FindControl("txtempaddress")).Text;
SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
con.Open();
SqlCommand cmd = new SqlCommand("EmployeeUpdate", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("#emp_id ", empid);
cmd.Parameters.AddWithValue("#emp_name ", name);
cmd.Parameters.AddWithValue("#emp_exp ", experience);
cmd.Parameters.AddWithValue("#emp_address ", address);
cmd.ExecuteNonQuery();//Sql Command Class method return effected rows use for insert,update, delete
EmployeeGridView.EditIndex = -1;// no row in edit mode
FillGrid();
}
protected void EmployeeGridView_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
int empid = Convert.ToInt32(EmployeeGridView.DataKeys[e.RowIndex].Value.ToString());
SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
con.Open();
SqlCommand cmd = new SqlCommand("DeleteEmployee", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("#emp_id ", empid);
cmd.ExecuteNonQuery();
FillGrid();
}
protected void EmployeeGridView_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
EmployeeGridView.PageIndex = e.NewPageIndex;
FillGrid();
}
protected void buttonDelete_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in EmployeeGridView.Rows)
{
var chk = row.FindControl("chkDelete") as CheckBox;
if (chk.Checked)
{
var lblID = row.FindControl("lblID") as Label;
Response.Write(lblID.Text + "<br>");
SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
SqlCommand comm = new SqlCommand("Delete from tbl_employee where Emp_id=#emp_id", conn);
// comm.CommandType = CommandType.StoredProcedure;
conn.Open();
comm.Parameters.AddWithValue("#emp_id", int.Parse(lblID.Text));
comm.ExecuteNonQuery();
conn.Close();
}
}
FillGrid();
}
protected void buttonUpdate_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in EmployeeGridView.Rows)
{
var chk = row.FindControl("chkDelete") as CheckBox;
if (chk.Checked)
{
SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
var lblID = row.FindControl("lblID") as Label;
var lblEmpName = row.FindControl("lblEmpName") as Label;
var lblEmpExp = row.FindControl("lblEmpExp") as Label;
var lblEmpAddress = row.FindControl("lblEmpAddress") as Label;
//Response.Write(lblFirstName.Text + "<br>");
SqlCommand comm = new SqlCommand("EmployeeUpdate", conn);
comm.CommandType = CommandType.StoredProcedure;
comm.Parameters.AddWithValue("#emp_id", int.Parse(lblID.Text));
comm.Parameters.AddWithValue("#emp_name", EmpName.Text);
comm.Parameters.AddWithValue("#emp_exp", EmpExp.Text);
comm.Parameters.AddWithValue("#Emp_address", EmpAddress.Text);
conn.Open();
comm.ExecuteNonQuery();
conn.Close();
EmpName.Visible = false;
EmpExp.Visible = false;
EmpAddress.Visible = false;
}
}
FillGrid();
}
}
For the column Name I need to make a hyperlink and when clicked the popout should come to edit and view data
Not sure I fully understand what do you need but you can check out how modal popup works in MS AJAX toolkit and try to emulate sample code that comes with the download.
I have a asp.net form displaying the user details from an Oracle database, using a grid-view. I even managed to get a check-box field in the grid-view using the following template..
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox runat="server" ID="chck"/>
</ItemTemplate>
</asp:TemplateField>
I want the admin to be able to select multiple entries using the check-boxes and perform a certain action on them. I tried using, for the delete operation, the following
for (int i = 0; i < GridView1.Rows.Count; i++)
{
if (Convert.ToBoolean(GridView1.Rows[i].Cells[1].Value == true))
GridView1.Rows.RemoveAt[i];
}
However, this shows an error. Apparently, each check-box on each row must have its own unique index. How do I get to it?
Any sort of help will be appreciated. Thanx :)
You need to find control inside your gridview row using findControl
for (int i = 0; i < GridView1.Rows.Count; i++)
{
CheckBox cb1 = (CheckBox)GridView1.Rows[i].FindControls("chck");
if(cb1.Checked)
GridView1.Rows.RemoveAt[i];
}
Use find control to get checkboxes:
for (int i = 0; i < GridView1.Rows.Count; i++)
{
CheckBox chck = (CheckBox)GridView1.Rows[i].FindControl("chck");
if (chck != null)
{
if (chck.Checked)
{
GridView1.Rows.RemoveAt[i];
}
}
}
This is Aspx FIle :
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
BackColor="White" BorderColor="#336699" BorderStyle="Solid" BorderWidth="1px"
CellPadding="0" CellSpacing="0" DataKeyNames="CategoryID" Font-Size="10"
Font-Names="Arial" GridLines="Vertical" Width="40%">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="chkStatus" runat="server"
AutoPostBack="true" OnCheckedChanged="chkStatus_OnCheckedChanged"
Checked='<%# Convert.ToBoolean(Eval("Approved")) %>'
Text='<%# Eval("Approved").ToString().Equals("True") ? " Approved " : " Not Approved " %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="CategoryID" HeaderText="CategoryID" />
<asp:BoundField DataField="CategoryName" HeaderText="CategoryName" />
</Columns>
<HeaderStyle BackColor="#336699" ForeColor="White" Height="20" />
</asp:GridView>
This is CS File :
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
LoadData();
}
}
private void LoadData()
{
string constr = #"Server=.\SQLEXPRESS;Database=TestDB;uid=waqas;pwd=sql;";
string query = #"SELECT CategoryID, CategoryName, Approved FROM Categories";
SqlDataAdapter da = new SqlDataAdapter(query, constr);
DataTable table = new DataTable();
da.Fill(table);
GridView1.DataSource = table;
GridView1.DataBind();
}
public void chkStatus_OnCheckedChanged(object sender, EventArgs e)
{
CheckBox chkStatus = (CheckBox)sender;
GridViewRow row = (GridViewRow)chkStatus.NamingContainer;
string cid = row.Cells[1].Text;
bool status = chkStatus.Checked;
string constr = #"Server=.\SQLEXPRESS;Database=TestDB;uid=waqas;pwd=sql;";
string query = "UPDATE Categories SET Approved = #Approved WHERE CategoryID = #CategoryID";
SqlConnection con = new SqlConnection(constr);
SqlCommand com = new SqlCommand(query, con);
com.Parameters.Add("#Approved", SqlDbType.Bit).Value = status;
com.Parameters.Add("#CategoryID", SqlDbType.Int).Value = cid;
con.Open();
com.ExecuteNonQuery();
con.Close();
LoadData();
}
I have an access DB (.mdb) named: Programs, with one table named: Data. By using the DataGridView I present the data from the table Data. I want to delete a row from the DataGridView and from the DB during runtime. Does anyone know how to do that (using C#)?
Another question I have is, who can i run queries on my DB?
thanks!
Very simple.
I suppose in your datagrid you have a check box by choosing which you will be able to choose the rows that you want to delete. And assuming you have a submit button, so after choosing the rows click on the submit button. In the button's click event call the Delete query say delete from tblname where id = #id [#id is the id that will be passed from your grid]
After that just populate the grid e.g. select * from tblname
e.g.
Aspx code
<asp:GridView runat="server" ID="gvTest" Width="100%" AutoGenerateColumns="false">
<Columns>
<asp:TemplateField HeaderText="Select" ItemStyle-HorizontalAlign="Center" ItemStyle-Width="5%">
<ItemTemplate>
<asp:CheckBox ID="chkDel" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText="RegID" DataField="RegID" ItemStyle-Width="10%">
<ItemStyle HorizontalAlign="Left"/>
</asp:BoundField>
<asp:TemplateField HeaderText="Name" ItemStyle-Width="22%" ItemStyle-HorizontalAlign="Left">
<ItemTemplate>
<asp:Label ID="lblName" runat="server" Width="100%" Text= '<%# DataBinder.Eval(Container.DataItem, "UserName")%>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<br>
<asp:Button runat="server" ID="btnSubmit" Text="Submit" OnClick="btnSubmit_Click"></asp:Button>
Submit button cilck event's code
protected void btnSubmit_Click(object sender, EventArgs e)
{
for (int count = 0; count < gvTest.Rows.Count; count++ )
{
CheckBox chkSelect = (CheckBox)gvTest.Rows[count].FindControl("chkDel");
if (chkSelect != null)
{
if (chkSelect.Checked == true)
{
//Receiveing RegID from the GridView
int RegID = Int32.Parse((gvTest.Rows[count].Cells[1].Text).ToString());
object result = DeleteRecord(RegID); //DeleteRecord Function will delete the record
}
}
}
PopulateGrid(); //PopulateGrid Function will again populate the grid
}
public void DeleteRecord(int RegId)
{
string connectionPath = "Data Source=<your data source>;Initial Catalog=<db name>;Integrated Security=True;userid='test';pwd='test'";
string command = "";
SqlConnection connection = new SqlConnection(#connectionPath);
command = "delete from tblname where id = " + RegId
try
{
connection.Open();
SqlCommand cmd = new SqlCommand(command, connection);
cmd.ExecuteNonQuery();
}
catch (SqlException sqlExcep) {}
finally
{
connection.Close();
}
}
public void PopulateGrid()
{
DataTable dt = new DataTable();
dt = GetRecord();
if(dt !=null && dt.rows.count>0)
{
gvTest.DataSource = dt;
gvTest.DataBind();
}
}
public DataTable GetRecord()
{
string connectionPath = "Data Source=<your data source>;Initial Catalog=<db name>;Integrated Security=True;userid='test';pwd='test'";
string command = "";
SqlDataAdapter adapter = new SqlDataAdapter();
SqlConnection connection = new SqlConnection(#connectionPath);
command = "Select * from tblname" ;
connection.Open();
SqlCommand sqlCom = new SqlCommand(command, connection);
adapter.SelectCommand = sqlCom;
DataTable table = new DataTable();
adapter.Fill(table);
return table;
}
Hope this makes sense.