Develop Reference

How to get the modified textbox value in c#?

I used a textbox in gridview to bind a value from db during pageload..
The problem is when i change the textbox value i could not get the modified value in c#, instead it gives the original value which had been there before i modified..
I am using nested GridViews...
kindly help me..
<asp:TemplateField HeaderText="Singles" >
<ItemTemplate>
<asp:HiddenField ID="hidqua" runat="server" Value='<%#bind("QualityName") %>' />
<asp:HiddenField ID="hidfau" runat="server" Value='<%#bind("FaultName") %>' />
<asp:TextBox ID="asptxtsingleg" runat="server" Text='<%# bind("singles") %>'></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
and below is my c# Coding
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "update")
{
foreach (GridViewRow row in grdInspection.Rows)
{
HiddenField hv = (HiddenField)row.FindControl("hidval");
GridView txtsi = (GridView)row.FindControl("grdInsiewChid");
foreach (GridViewRow row1 in txtsi.Rows)
{
HiddenField htn = (HiddenField)row1.FindControl("hdnPLength");
GridView nesgrid = (GridView)row1.FindControl("GridView1");
foreach (GridViewRow row2 in nesgrid.Rows)
{
HiddenField qn = (HiddenField)row2.FindControl("hidqua");
TextBox t = (TextBox)row2.FindControl("asptxtsingleg");
}
}
}
}
}

Assuming you are using button to fire the RowCommand event.
<asp:TemplateField HeaderText="Singles">
<ItemTemplate>
<asp:TextBox ID="asptxtsingleg" runat="server" Text='<%# Eval("singles") %>' Width="120px"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Edit">
<ItemTemplate>
<asp:Button ID="BtnEdit" runat="server" Text="Update" CommandName="updateData" CommandArgument='<%# Eval("Your_ID") %>' />
</ItemTemplate>
</asp:TemplateField>
Code behind:
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "updateData")
{
//int i = Convert.ToInt32(e.CommandArgument);
GridViewRow row = (GridViewRow)(((Button)e.CommandSource).NamingContainer);
TextBox tb = (TextBox)row.FindControl("asptxtsingleg");
}
}

You can use below code to get the text box value in RowUpdating event
GridViewRow row = (GridViewRow)GridView1.Rows[e.RowIndex];
TextBox t= (TextBox)row.FindControl("asptxtsingleg");

Cannot get Values from Gridview

Hello i have a gridview Naming FolderGridView. in the GridView There is a template field and inside the template field i am specifying a Linkbutton. Now i cannot get values from the linkButton in my codeBehind.
<asp:GridView ID="FolderGridView" runat="server"
AutoGenerateColumns = "False"
AllowPaging ="True" OnPageIndexChanging ="FolderGridView_PageIndexChanging" CellPadding="4" ForeColor="#333333" GridLines="None"
>
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:TemplateField HeaderText="Select">
<ItemTemplate>
<asp:CheckBox ID="FolderCheckBox" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Folder Name">
<ItemTemplate>
<asp:LinkButton Text='<%#Eval("File Name")%>' PostBackUrl='<%# String.Format("InsideFolder.aspx?FolderName={0}", Eval("File Name") ) %>' runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
my code Behind
for (int i = 0; i < FolderGridView.Rows.Count; i++)
{
CheckBox chk = (CheckBox)FolderGridView.Rows[i].FindControl("FolderCheckBox");
if (chk.Checked == true)
{
string FileName = (string)FolderGridView.Rows[i].Cells[1].Text.ToString();
}
}
I have debugged the code behind portion. In FileName i get an empty string when i get to this point. How to get values from the template field then?

The text in the cell is inside the LinkButton control, so first you have to get the LinkButton control of the GridView row, and then you can access the Text property. The following code should work in your case:
for (int i = 0; i < FolderGridView.Rows.Count; i++){
CheckBox chk = (CheckBox)FolderGridView.Rows[i].FindControl("FolderCheckBox");
if (chk.Checked == true){
foreach (Control ctl in FolderGridView.Rows(i).Cells(1).Controls) {
if (ctl is LinkButton) {
string filename = ((LinkButton)ctl).Text;
}
}
}

replace Link Button with
EDIT:
For LinkButton:
<asp:LinkButton ID="LinkButton1" AutoPostBack="True" OnClick="someMethod" Text='<%#Eval("File Name")%>' PostBackUrl='<%# String.Format("InsideFolder.aspx?FolderName={0}", Eval("File Name") ) %>' runat="server" />
and code Behind
protected void someMethod(object sender, EventArgs e)
{
foreach (GridViewRow item in GridView5.Rows)
{
CheckBox chk = (CheckBox)item.FindControl("FolderCheckBox");
if (chk.Checked == true)
{
string probname = chk.Text;
}
}
}

Find header value for a cell in a grid

I have gridview, I want to do a foreach on it's rows and get the value from column's header where there's a Label for one cell from this row.
foreach (GridViewRow mainRow in grid1.Rows)
{
var header = mainRow.Cells[2].Parent.FindControl("LabelID");//is null
}
How do I find it ?

If you want the value in RowDataBound event then you can check RowType like this
if(e.Row.RowType == DataControlRowType.Header)
{
Label header = (Label)e.Row.FindControl("LabelID");
}

I would access the headerRow and enumerate through the according cells (on buttonClick or on RowDataBound ...)
default.aspx
<asp:GridView AutoGenerateColumns="false" ID="GridView1" runat="server">
<Columns>
<asp:TemplateField>
<HeaderTemplate>
<asp:Label ID="headerLabel1" runat="server" Text="Headercolumn1"></asp:Label>
</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="itemLabel1" runat="server" Text='<%# Eval("name") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:Button ID="btnGetHeader" runat="server" Text="GetHeader" OnClick="btnGetHeader_Click" />
default.aspx.cs
protected void btnGetHeader_Click(object sender, EventArgs e)
{
foreach (TableCell headerCell in GridView1.HeaderRow.Cells)
{
// or access Controls with index
// headerCell.Controls[INDEX]
Label lblHeader = headerCell.FindControl("headerLabel1") as Label;
if (lblHeader != null)
Debug.WriteLine("lblHeader: " + lblHeader.Text);
}
}

Linkbutton inside a gridview not firing

<asp:GridView ID="gvBlockUnblock" runat="server" AutoGenerateColumns="False"
BackColor ="AliceBlue"
onrowdatabound="gvBlockUnblock_RowDataBound" DataKeyNames="CPID,PUBLISHED"
style="margin-top: 0px"
AllowPaging="True" onpageindexchanging="gvBlockUnblock_PageIndexChanging"
PageSize="10" EnableViewState= "true"
onselectedindexchanged="gvBlockUnblock_SelectedIndexChanged" >
<Columns>
<asp:TemplateField HeaderText="S.No.">
<ItemTemplate>
<asp:LinkButton ID="lbSNo" runat="server"
Text='<%# (Eval("sno")) %>'
PostBackUrl='<%#"~/_UILayer/ComplaintReport.aspx?PINo="+Eval("CPID") %>' >
</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField HeaderText = "Complaint" />
<asp:HyperLinkField DataNavigateUrlFields="CPID" datatextfield = "CPID"
DataNavigateUrlFormatString="WebForm1.aspx?CPID={0}" HeaderText=" Problem Item No"/>
<asp:BoundField DataField="NewComplaints"
HeaderText="Number of New Complaints" SortExpression="NewComplaints" />
<asp:BoundField DataField="TotalNumberofComplaints"
HeaderText="Total Number of Complaints" SortExpression="TotalNumberofComplaints" />
<asp:BoundField DataField="NumberofUnblocks" HeaderText="Number of Unblocks"
SortExpression="TotalNumberofComplaints" />
<asp:TemplateField HeaderText = "Comments">
<ItemTemplate>
<asp:TextBox ID="txtAdminComment" Font-Names="Arial" ReadOnly="false" Width="200" Height="30"
TextMode="multiLine" runat="server" BorderStyle="NotSet"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText = " Block / Unblock">
<ItemTemplate>
<asp:button ID ="btnBlockUnblock" runat = "server"
Text = '<%# CheckBlock(Eval("PUBLISHED")) %>' CommandName="Select"
CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" CausesValidation="False" />
</ItemTemplate>
</asp:TemplateField>
<asp:HyperLinkField DataNavigateUrlFields="CPID" Text="View Details"
DataNavigateUrlFormatString="ItemHistoryForm.aspx?CPID={0}" HeaderText=" Problem Item No"/>
</Columns>
</asp:GridView>
aspx.cs
protected void gvBlockUnblock_SelectedIndexChanged(object sender, EventArgs e)
{
string ComplaintProfileId = gvBlockUnblock.DataKeys[gvBlockUnblock.SelectedIndex].Values["CPID"].ToString();
string ISPUBLISHED = gvBlockUnblock.DataKeys[gvBlockUnblock.SelectedIndex].Values["PUBLISHED"].ToString();
string date = System.DateTime.Now.ToString();
TextBox tb = (TextBox)gvBlockUnblock.Rows[gvBlockUnblock.SelectedIndex].FindControl("txtAdminComment");
string Comment = tb.Text;
if (string.IsNullOrEmpty(Comment))
{
WebMsgBox.Show("empty");
}
else
{
if (ISPUBLISHED == "N")
{
ISPUBLISHED = "N";
}
else
{
ISPUBLISHED = "Y";
}
string AdminComment = (System.DateTime.Now.ToString() + " : " + Comment);
AddCommentBLL.InsertComment(AdminComment, ComplaintProfileId, ISPUBLISHED);
gvBlockUnblock.DataSource = AddCommentBLL.GetItem();
gvBlockUnblock.DataBind();
}
}
So, on click of the button ID ="btnBlockUnblock", this grid view selectedindex changed needs to fire. The page is refreshing though.
Thanks
Sun

You have to use the GridView RowCommand event instead of the GridView SelectedIndex Change.. e.g
protected void gvBlockUnblock_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Select")
{
string ComplaintProfileId = gvBlockUnblock.DataKeys[gvBlockUnblock.SelectedIndex].Values["CPID"].ToString();
string ISPUBLISHED = gvBlockUnblock.DataKeys[gvBlockUnblock.SelectedIndex].Values["PUBLISHED"].ToString();
string date = System.DateTime.Now.ToString();
TextBox tb = (TextBox)gvBlockUnblock.Rows[gvBlockUnblock.SelectedIndex].FindControl("txtAdminComment");
string Comment = tb.Text;
if (string.IsNullOrEmpty(Comment))
{
WebMsgBox.Show("empty");
}
else
{
if (ISPUBLISHED == "N")
{
ISPUBLISHED = "N";
}
else
{
ISPUBLISHED = "Y";
}
string AdminComment = (System.DateTime.Now.ToString() + " : " + Comment);
AddCommentBLL.InsertComment(AdminComment, ComplaintProfileId, ISPUBLISHED);
gvBlockUnblock.DataSource = AddCommentBLL.GetItem();
gvBlockUnblock.DataBind();
}
}
}
Edit: After reading code from your comment, I found your problem.
What happens actually, when you click the button, the Page Load event fires before your gridview event and there your gridview data again binded and it lost your fired event. You have to examine your page Postback by putting if(!IsPostBack) in your page load where you are trying to bind your data to gridview.
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
// gets the items table using stored proc GetItem
gvBlockUnblock.DataSource = AddCommentBLL.GetItem();
gvBlockUnblock.DataBind();
// used for paging
Session["MyDataSett"] = gvBlockUnblock.DataSource;
}
}

Find out a CHECKBOX in a DATAGRID in ASP.NET

I have a GRIDVIEW and with several CHECKBOXS.
When i selected a CHECKBOX I need run some code.
To detect it, I use an EVENT HANDLER for the CHECKBOX included in a GRIDVIEW.
I cannot access the CHECKBOX with my wrong code.
Do you have any idea what I am doing wrong? Thanks for your help. Bye
ASPX
<asp:Label ID="uxMessageDisplayer" runat="server" Visible="False" EnableViewState="False"></asp:Label>
<asp:GridView ID="uxUserListDisplayer" runat="server" AutoGenerateColumns="False"
OnRowDataBound="uxUserListDisplayer_RowDataBound">
<Columns>
<asp:TemplateField HeaderText="Active">
<ItemTemplate>
<asp:CheckBox ID="uxActiveCheckBoxSelector" runat="server" AutoPostBack="true" OnCheckedChanged="uxRoleCheckBoxSelector_CheckChanged" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Users">
<ItemTemplate>
<asp:Label runat="server" ID="uxUserNameLabelDisplayer" Text='<%# Container.DataItem %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="uxLinkEditButton" runat="server" CausesValidation="False" CommandName="Edit"
Text="Edit"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="uxLinkDeleteButton" runat="server" CausesValidation="False" CommandName="Delete"
Text="Delete"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
CODE BEHIND
protected void uxRoleCheckBoxSelector_CheckChanged(object sender, EventArgs e)
{
// Reference the CheckBox that raised this event
//CheckBox uxActiveCheckBoxSelector = sender as CheckBox;
CheckBox activeCheckBox = (CheckBox)FindControl("uxActiveCheckBoxSelector");
if (activeCheckBox.Checked == true)
{
uxMessageDisplayer.Text = "T - Aproved User";
uxMessageDisplayer.Enabled = false;
}
else
{
uxMessageDisplayer.Text = "F - NOT Aproved User";
uxMessageDisplayer.Enabled = false;
}
}

If I am not mistaken by your question, you are trying to set the text of the label on the same row with the checkbox based on its checked status.
Below is the code snippet I tried on my pc, hope it helps.
.aspx:
<asp:GridView ID="GridView1" runat="server">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" OnCheckedChanged="CheckBox1_CheckChanged" AutoPostBack="true" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
.cs:
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack)
return;
//create dummy data
List<string> rows = new List<string>();
Enumerable.Range(1, 5).ToList().ForEach(x => rows.Add(x.ToString()));
//bind dummy data to gridview
GridView1.DataSource = rows;
GridView1.DataBind();
}
protected void CheckBox1_CheckChanged(object sender, EventArgs e)
{
//cast sender to checkbox
CheckBox CheckBox1 = (CheckBox)sender;
//retrieve the row where checkbox is contained
GridViewRow row = (GridViewRow)CheckBox1.NamingContainer;
//find the label in the same row
Label Label1 = (Label)row.FindControl("Label1");
//logics
if (CheckBox1 != null) //make sure checkbox1 is found
{
if (CheckBox1.Checked)
{
if (Label1 != null) //make sure label1 is found
{
Label1.Text = "Checked";
}
}
else
{
if (Label1 != null)
{
Label1.Text = "Unchecked";
}
}
}
}

I'm assuming the event handler is actually registered to the checkbox.
CheckBox activeCheckBox = (CheckBox)sender;
what is "uxActiveCheckBoxSelector" and why are you ignoring sender?

Code corrected as suggest!
Usefull resource for beginners
protected void uxRoleCheckBoxSelector_CheckChanged(object sender, EventArgs e)
{
// Cast sender to CheckBox
CheckBox activeCheckBox = (CheckBox)sender;
// Retrieve the row where CheckBox is contained (NamingContainer used to retrive parent control
GridViewRow row = (GridViewRow)activeCheckBox.NamingContainer;
if (activeCheckBox.Checked == true)
{
uxMessageDisplayer.Text = "T - Aproved User";
}
else
{
uxMessageDisplayer.Text = "F - NOT Aproved User";
}
}