Gridview onrowcommand on firing - asp.net

Question

This is my grid view
<asp:GridView ID="GridView1" runat="server"
AutoGenerateColumns="False"
OnRowDeleting="GridView1_RowDeleting"
OnRowEditing="GridView1_RowEditing"
OnRowUpdating="GridView1_RowUpdating"
OnRowCommand="GridView1_RowCommand">
<Columns>
<asp:BoundField DataField="name" HeaderText="name" />
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton ID="btn1" Text="edit" runat="server" CommandArgument='<%#Eval("id") %>' CommandName="Edit" ></asp:LinkButton>
<asp:LinkButton ID="Button1" Text="delete" runat="server" CommandArgument='<%#Eval("id") %>' CommandName="Delete" OnClientClick=' return confirm("do you want to delete")' ></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
This is the function call
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
Response.Write(e.CommandArgument.ToString());
if (e.CommandName == "Delete")
{
//Response.Write(e.CommandArgument);
MySqlConnection conn = new MySqlConnection(connectionString);
conn.Open();
string query = "delete from brand where id='" + e.CommandArgument + "'";
MySqlCommand cmd = new MySqlCommand(query,conn);
cmd.ExecuteNonQuery();
conn.Close();
fillgrid();
}
}
The onrowcommand does not get fired. Why?

Answer 1

Just guessing: because your Page_Load looks similar to this:
protected void Page_Load(Object sender, EventArgs e)
{
DataBindGridView(); // here you load the datasource of the grid and call DataBind();
}
Do not DataBind the grid on postbacks, otherwise events aren't triggered since you overwrite changes with the values form database, so this should work then:
protected void Page_Load(Object sender, EventArgs e)
{
if(!IsPostBack)
DataBindGridView(); // here you load the datasource of the grid and call DataBind();
}

Answer 2

Enable viewstate:
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="something.cs"
ValidateRequest="false" Inherits="something" EnableViewState="true" %>
In the Page load event, do:
if(!IsPostback)
{
callmethodtobindgrid();
}
Rowcommand event handler:
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
Response.Write(e.CommandArgument.ToString());
if (e.CommandName == "Delete")
{
//Response.Write(e.CommandArgument);
MySqlConnection conn = new MySqlConnection(connectionString);
conn.Open();
string query = "delete from brand where id='" + e.CommandArgument + "'";
MySqlCommand cmd = new MySqlCommand(query, conn);
cmd.ExecuteNonQuery();
conn.Close();
fillgrid();
}
}