Forms Data Controls :: Set A Button Enable To False On Page_load When Part Of A Gridview?
May 10, 2010
I have a set of 4 buttons which part of a gridview template and I load the gridview on page_load. The datasource for the gridview comes via my controller as I am using Microsoft's Model View Controller design pattern. I set 4 public properties for each of the 4 buttons, which I can access in my controller class/method. However, when I call the method for the gridview, which sets the datasource for it on page_load, I get an error message when I try to set the enable to false. It says "Object not set to instance of object". The objective I am trying to do here is a check on a returned value, which I can achieve, and based on the return of the value that is returned, to either set the button enable to true or to false.
Unfortunately, I am getting this Object not set to instance of object error message, and I do not know how to resolve it.
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<asp:GridView ID="GridView1" runat="server" >
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="myCheckBox1" runat="server"/>
[Code] .....
always returns a false value even though if it is checked
Dim myCheckBox As CheckBox = CType(row.FindControl("myCheckBox1"), CheckBox)
If myCheckBox.Checked = True Then
End if
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Mar 10, 2014
There is a Gridview in my web page with select button as below:
<div class="test01" style="height:200px;overflow-y:scroll;overflow-x:hidden" align="center">
<asp:GridView Width="100%" ID="GAsset" runat="server" AutoGenerateColumns="False" DataKeyNames="AssetId">
<Columns>
<asp:BoundField DataField="AssetId" HeaderText="AssetId"/>
<asp:BoundField DataField="AssetName" HeaderText="Asset Name"/>
[Code] ....
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code is below:
protected void btnSelect_Click(object sender, EventArgs e) {
foreach (GridViewRow row in GAsset.Rows) {
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string key = Convert.ToString(GAsset.DataKeys[row.RowIndex].Value);
[Code]....
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[URL]....
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[Code]....
[Code]....
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[Code]....
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<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
</head>
<body>
<form id="form1" runat="server">
<div>
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onrowupdating="GridView1_RowUpdating"
onrowediting="GridView1_RowEditing">
<Columns>
<asp:CommandField ShowEditButton="True" />
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<EditItemTemplate>
<asp:CheckBox ID="chkIsPaid" runat="server" />
</EditItemTemplate>
<ItemTemplate>
<asp:Label id="Label1" Runat="server" Text='No'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
CodeBehind:
public partial class Default3 : System.Web.UI.Page
{
private DataSet dsEmpList = new DataSet();
protected void Page_Load(object sender, EventArgs e)
{
BindGridView();
}
protected void BindGridView()
{
dsEmpList = GetEmpList();
GridView1.DataSource = dsEmpList;
GridView1.DataBind();
}
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{
CheckBox box = (CheckBox)GridView1.Rows[e.RowIndex].FindControl("chkIsPaid");
if ((box != null) && box.Checked)
{
//do whatever
}
}
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{
GridView1.EditIndex = e.NewEditIndex; // turn to edit mode
BindGridView(); // Rebind GridView to show the data in edit mode
}
}
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"Unable to cast object of type 'System.EventArgs' to type 'System.Web.UI.WebControls.GridViewRowEventArgs'."
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[Code]....
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[Code]....
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Jul 28, 2010
I am using 5items inside one template field & Grid Contains only one Column.Plz Tell me how to do sortingbased on the onefield(i.e,Date&time field) out of the 5.The main logic i want implement is Most recent dated item shound come first.Kindly help me soon.asap. Awauiting[Edit - Split from closed thread: Enable Sorting in a GridView control]
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Aug 10, 2010
<asp:ButtonField Text="Void" ButtonType="Link" CommandName="Void" />
' RowCommand
Dim f_iIndex As Integer = Convert.ToInt32(e.CommandArgument)
Dim f_oSelectedRow As GridViewRow = grdMeterCorrection.Rows(f_iIndex)
Dim f_oCertIdCell As TableCell = f_oSelectedRow.Cells(11)
Dim f_sCertId As String = f_oCertIdCell.Text.Trim
If e.CommandName.ToLower = "void" Then
Dim f_bVoidRet As Boolean = VoidCert(f_sCertId)
End If
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Nov 23, 2010
i calc the sum of columns using:
begBal = Utilities.SumDataColumn( "begBal", dt);
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[code]....
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