How to find all the checked checkboxes in an asp.net gridview

I have seen this question a gazillion times on the forums – Finding checked checkboxes in an ASP.NET GridView. Here’s how to do so. The CheckBox in our example is in a TemplateField as shown below:

<asp:TemplateField>   
    <ItemTemplate >      
       <asp:CheckBox id="CheckBox1" runat="server" />  
     </ItemTemplate> 
</asp:TemplateField>

In order to find the checked checkboxes on a button click, use this simple code

C#

    protected void Button1_Click(object sender, EventArgs e)
    {    
        foreach (GridViewRow gvr in GridView1.Rows)
        {
            CheckBox chkBox = (CheckBox)gvr.FindControl("CheckBox1");
            if (chkBox != null && chkBox.Checked)
            {

            }
        }
    }

VB.NET

Protected Sub Button1_Click(ByVal sender As Object, _
ByVal e As EventArgs)
    For Each gvr As GridViewRow In GridView1.Rows
        Dim chkBox As CheckBox = _
           CType(gvr.FindControl("CheckBox1"), CheckBox)
        If chkBox IsNot Nothing AndAlso chkBox.Checked Then
        ' Do Something
        End If
    Next gvr
End Sub

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About The Author

Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

Follow him on twitter @suprotimagarwal