您需要为此使用OnRowCommand事件.

you need to use OnRowCommand event for that.

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"

                    Width="180px" AutoGenerateEditButton="True"

OnRowCommand=GridView1_RowCommand

onselectedindexchanged="GridView1_SelectedIndexChanged">

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            switch (e.CommandName)
            {
                case "sms":
                    {
                        //your code here...
                        break;
                    }
                default:
                   break;

        }
}

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<%@ Page Language="C#" AutoEventWireup="true"   EnableEventValidation="false" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<asp:Button ID="b1" runat="server" Text="sms"  CommandName="sms" onclick="B1_Click" />

protected void B1_Click(object sender, EventArgs e)
    {
        Button1.Text = "santhu";
    }