更新面板中的按钮事件不是触发 [英] Button event within the update Panel is not Triggering
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问题描述
问题：我在更新面板中创建了一个DropDownList按钮以显示Gridview，但是当我在下拉列表中选择项目时，我的网格视图不在更新面板中/单击按钮时未点击/索引更改事件显示网格视图？
这是我的设计：
Question : I Created a DropDownList, button within update Panel to display the Gridview,but my grid view is not in the update panel when is selecting the item in dropdown/clicking the button the click /index change event is not fired to display the Grid View?
This is my Design:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="probrand.aspx.cs" Inherits="probrand" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel runat="server" id="UpdatePanel" UpdateMode="Always" >
<Triggers>
<asp:AsyncPostBackTrigger controlid="Btn_Grid"/>
</Triggers>
<ContentTemplate>
<div>
<table>
<tr>
<td><asp:DropDownList ID="ddlitems" runat="server" AutoPostBack="true" onselectedindexchanged="ddlitems_SelectedIndexChanged" CausesValidation="false" ></asp:DropDownList></td>
<td><asp:Button ID="Btn_Grid" runat="server" onclick="Btn_Grid_Click" Text="Grid" CausesValidation="false" /></td>
</tr>
</table>
</div>
</ContentTemplate>
</asp:UpdatePanel>
<%-- <asp:ListItem Id="DL1" Text="Lee" runat="server">
</asp:ListItem>
<asp:ListItem Id="DL2" Text="Levis" runat="server">
</asp:ListItem> --%>
<%--</asp:DropDownList> --%>
<asp:GridView ID="GRD" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:TemplateField HeaderText="Product_ID">
<ItemTemplate>
<asp:Label ID="LblProductID" runat="server" Text='<%#Eval("P_id") %>'>
</asp:Label>
<asp:TextBox ID="txtProductID" runat="server" Text='<%#Bind("P_id") %>' Visible="false">
</asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Product_Name">
<ItemTemplate>
<asp:Label ID="LblProductName" runat="server" Text='<%#Bind("Product_Name") %>'>
</asp:Label>
<asp:TextBox ID="TxtProductName" runat="server" Text='<%#Bind("Product_Name")%>' Visible="false">
</asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Price">
<ItemTemplate>
<asp:Label ID="LblPrice" runat="server" Text='<%#Bind("Price") %>'>
</asp:Label>
<asp:TextBox ID="TxtPrice" runat="server" Text='<%#Bind("Price") %>' Visible="false">
</asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Brand_Name">
<ItemTemplate>
<asp:Label ID="LblBrandName" runat="server" Text='<%#Bind("B_Name") %>'>
</asp:Label>
<asp:TextBox ID="TxtBrandName" runat="server" Text='<%# Bind("B_Name") %>' Visible="false">
</asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Edit">
<ItemTemplate>
<asp:Button ID="BtnEdit" runat="server" Text="Edit" CommandArgument='<%# Bind("P_id") %>' OnCommand="Edit" />
<asp:Button ID="BtnUpdate" runat="server" Text="Update" CommandArgument='<%# Bind("P_id") %>' OnCommand="Update" />
<asp:Button ID="BtnCancel" runat="server" Text ="Cancel" CommandArgument='<%# Bind("P_id") %>' OnCommand="Cancel" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
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