asked on

GridView select row

Hi,

Im trying to change the value of lblXVal label control by changing the value in the textbox1 control (by firing textbox_changed event). When I change the value in the textbox its changes values in all lblXval controls in the grid instead of changing the lblXval for the current row where I changed the TextBox1 value.

		  <asp:GridView ID="gvFiles" runat="server" AutoGenerateColumns="False" BackColor="White"
			BorderColor="#999999" BorderStyle="Solid" BorderWidth="1px" CellPadding="3" ForeColor="Black"
			GridLines="Vertical" OnRowDeleting="Delete" DataKeyNames="id" Width="682px">
			<AlternatingRowStyle BackColor="#CCCCCC" />
			<Columns>
			   <asp:TemplateField HeaderText="X" SortExpression="xval">
				 <ItemTemplate>
				    <asp:Label ID="lblXVal" runat="server" Text='<%# Bind("xval") %>'></asp:Label>
				 </ItemTemplate>
			   </asp:TemplateField>

			   <asp:TemplateField HeaderText="Scale">
				 <ItemTemplate>
				    <asp:TextBox ID="TextBox1" runat="server" Text="1" AutoPostBack="true" ontextchanged="TextBox2_TextChanged"></asp:TextBox>
				 </ItemTemplate>
			   </asp:TemplateField>
...

code
 protected void TextBox2_TextChanged (object sender, EventArgs e)
   {

	 for (int count = 0 ; count < gvFiles.Rows.Count ; count++)
	 {
	    string x = ((Label)gvFiles.Rows[count].FindControl ("lblXVal")).Text;
	    string s = ((TextBox)gvFiles.Rows[count].FindControl ("TextBox1")).Text;

	    Label t = ((Label)gvFiles.Rows[count].FindControl ("lblXVal"));

	    t.Text = (Convert.ToDouble (x) * Convert.ToDouble (s)).ToString ();

	 }

}

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How can I fix the the problem?

Ayha

Cluskitt

You're looping all rows. Instead of using for, just run it once and use e.RowIndex as the row number.

ayha1999

ASKER

how can I RowIndex? please give me the code.

Thanks

jitendra patil

Hi ayha1999

you need to make some changes in aspx code as below:

1. add a javascript in the head section of your page
<script type="text/javascript" language="javascript">

function DoPostBackWithRowIndex(rowIndex){
if (document.getElementById('<%=HDVal.ClientID%>') != null) {
document.getElementById('<%=HDVal.ClientID%>').value = rowIndex;
}
return true;
}
</script>
2.add a hidden field above your grid view as
<asp:HiddenField ID="HDVal" runat="server" />

3. Now add a row databound event to your gridview and do the code as follows:
protected void gvFiles_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
TextBox TxtMarks = (TextBox)e.Row.FindControl("TextBox1");
TxtMarks.Attributes.Add("onkeydown", "javascript:return DoPostBackWithRowIndex('" + e.Row.RowIndex + "');");
}
}
4 .Now modify your Textchanged event as below
protected void TextBox2_TextChanged(object sender, EventArgs e)
{
if (HDVal.Value.Trim().Length == 0)
{
return;
}
else
{
int Rowindex= Convert.ToInt32(HDVal.Value);
string x = ((Label)gvFiles.Rows[Convert.ToInt16(Rowindex)].FindControl("lblXVal")).Text;
string s = ((TextBox)gvFiles.Rows[Rowindex].FindControl("TextBox1")).Text;

Label t = ((Label)gvFiles.Rows[Rowindex].FindControl("lblXVal"));
t.Text = (Convert.ToDouble(x) * Convert.ToDouble(s)).ToString();
}
}
and it will work as expected.

hope this helps.

ayha1999

ASKER

Hi patil786,

I tried followed you code exacty, it is firing but not changing the value of lblXVal.

Please check.

Thanks

ASKER CERTIFIED SOLUTION

jitendra patil

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ayha1999

ASKER

Thank you so much.

ayha

ayha1999

ASKER

Hi patil,

Could you please have look the following question?

https://www.experts-exchange.com/questions/28161806/Datalist-selected-row.html

Thanks

ayha