table>
    asp:Repeater ID="rptList" runat="server"OnItemCommand="rptList_ItemCommand">
    ItemTemplate>
tr>
    td>asp:TextBox ID="txtNum" runat="server" Text='%#Eval("ProNum")%>'>/asp:TextBox>/td>
    td>asp:Button ID="btnUpdate" runat="server" Text="更新"CommandName="update" CommandArgument='%#Eval("PID") %>' />/td>
/tr>
    /ItemTemplate>
    /asp:Repeater>
/table>

protected void rptList_ItemCommand(object source, RepeaterCommandEventArgs e)
{
    switch (e.CommandName)
     {
        case "update":
            string arg = e.CommandArgument.ToString();//取得参数
            //找到激发事件的行内控件，这个很有用，能将更多需要的参数值传递过来。
             TextBox txtNum = e.Item.FindControl("txtNum") as TextBox;

            //下面执行业务逻辑
            string jsStr = "script>alert('删除成功!" + txtNum.Text + "')/script>";
             Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", jsStr,false);
            break;
     }
     Bind();
}