Grid View Disable button checkbox checked

Try this assuming that you have only two categories

<asp:GridView ID="MyGV" runat="server" AutoGenerateColumns="False" DataKeyNames="ID">

<Columns>

<asp:TemplateField>

<ItemTemplate>

<asp:CheckBox ID="MyCBox" Text="Select Cat" AutoPostBack="true" ToolTip='<%#Bind("category") %>' OnCheckedChanged="MyCBox_CheckedChanged" runat="server" />

 ItemTemplate>

asp:TemplateField> <asp:BoundField DataField="ID" HeaderText="ID" SortExpression="ID" />

<asp:BoundField DataField="category" HeaderText="Category" SortExpression="category" />

Columns>

Code behind event for the checkbox

protected void MyCBox_CheckedChanged(object sender, EventArgs e) {

if( ((CheckBox)sender).ToolTip == "cat1" {

 Btn1.Enabled = true;

Btn2.Enabled = false;

}

else

{

Btn1.Enabled = false;

Btn2.Enabled = true;

}

}