我在表单中有一些asp .net服务器控件，我想在不使用java脚本按下图像按钮的情况下验证一个asp.net 文本框空白，由于此图像按钮不是数据发布按钮，因此相关的错误标签根本不显示任何错误。
代码
protected void ImageButtonAddItem_Click(object sender, ImageClickEventArgs e)
{
if (!TextBoxItemCode.Text.Trim().Equals(string.Empty))
{
poDetails.Add(
new PurchaseOrderDetail
{
ItemDetail = new ItemService().GetItemByID(Convert.ToInt32(TextBoxItemCode.Text.Trim())),
POQty = Convert.ToInt32(TextBoxQty.Text),
ItemUOM = DropDownListUOM.SelectedItem.Text,
ActiveStatus = true
}
);
}
else
{
labelerror.Text = "Please select an item to Add .";
}
GridViewPurchaseOrder.DataSource = poDetails;
GridViewPurchaseOrder.DataBind();
}
labelerror.Text =＆＃34;请选择要添加的项目。＆＃34 ;;部分没有得到更新，即使它被断点击中
protected void Page_Load(object sender, EventArgs e)
{
if (!Session["SessionID"].ToString().Equals(Session.SessionID.ToString()))
{
Response.Redirect("~/User/Login.aspx");
}
if (!new UserPermitionLevelsServices().GetPermissionByID(
Convert.ToInt16(Session["LoginGroupID"].ToString()),
Convert.ToInt16(Session["LoginUserID"].ToString())
, new FormServices().GetFormByName("PurchaseOrder"), 0))
{
labelerror.Text = "No Authority To Use This Resource";
LockControls(false);
}
else
{
labelerror.Text = "";
LockControls(true);
}
supplierID = Convert.ToInt16(Request.QueryString["supplierID"]);
DropDownLocationList.Items.Add("--Select--");
if (!IsPostBack)
{
MultiViewMain.ActiveViewIndex = 0;
MultiViewItem.ActiveViewIndex = 0;
if (supplierID != 0)
{
GetSupplierByID(supplierID);
}
PopulateUOMList();
PopulateLocations();
}
}
html
<%@ Page Title="" Language="C#" MasterPageFile="~/Classic.Master" AutoEventWireup="true"
CodeBehind="PurchaseOrder.aspx.cs" Inherits="NewClient.OrderProcessing.UI.Transaction.PurchaseOrder" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="body" runat="server">
<%-- <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager> --%>
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" EnablePartialRendering="true" CombineScripts="false">
</asp:ToolkitScriptManager>
<div style="text-align: center">
<asp:Label ID="labelerror" runat="server" Text="Error" CssClass="errorLabel"
EnableViewState="False"></asp:Label>
</div>
<br />
<div style="width: 750px; height: 524px">
<asp:UpdatePanel runat="server" ID="upnlSerachSupplier">
<ContentTemplate>
<asp:MultiView ID="MultiViewMain" runat="server">
<asp:View ID="View1" runat="server">
<div style="z-index: 100; left: 1px; width: 700px; position: relative; top: 1px;
height: 230px">
<asp:Label ID="Label1" runat="server" Style="z-index: 103; left: 10px; position: absolute;
top: 20px" Width="92px">Order No</asp:Label>
<asp:TextBox ID="TextBoxOrderNo" runat="server" Width="100px" Style="z-index: 100;
left: 80px; position: absolute; top: 20px" >0001</asp:TextBox>
<asp:Label ID="Label2" runat="server" Style="z-index: 103; left: 200px; position: absolute;
top: 20px" Width="92px">Order Ref. No</asp:Label>
<asp:TextBox ID="TextBoxOrderRefNo" runat="server" Width="100px" Style="z-index: 100;
left: 300px; position: absolute; top: 20px" />
<asp:RequiredFieldValidator ID="RV1" runat="server" ErrorMessage="*" Style="z-index: 100;
left: 405px; position: absolute; top: 20px; width: 10px" ForeColor="Red" ControlToValidate="TextBoxOrderRefNo"
ValidationGroup="save" Font-Bold="True" Font-Size="Larger" />
<asp:Label ID="Label3" runat="server" Style="z-index: 103; left: 425px; position: absolute;
top: 20px" Width="92px">Location</asp:Label>
<asp:DropDownList ID="DropDownLocationList" runat="server" Style="z-index: 100; left: 485px;
position: absolute; top: 20px" Width="109px" />
<asp:RequiredFieldValidator ID="RV2" runat="server" ErrorMessage="Select Location"
InitialValue="--Select--" Style="z-index: 100; left: 600px; position: absolute;
top: 20px; width: 125px" ForeColor="Red" ControlToValidate="DropDownLocationList"
ValidationGroup="save" />
<asp:Label ID="Label6" runat="server" Style="z-index: 103; left: 10px; position: absolute;
top: 60px; width: 50px;">Supplier Code</asp:Label>
<asp:TextBox ID="TextBoxSupCode" runat="server" Width="100px" Style="z-index: 100;
left: 80px; position: absolute; top: 60px" />
<asp:Label ID="Label4" runat="server" Style="z-index: 103; left: 200px; position: absolute;
top: 60px; width: 95px;">Supplier Name</asp:Label>
<asp:TextBox ID="TextBoxSupplierName" runat="server" Style="z-index: 100; left: 300px;
position: absolute; top: 60px; width: 300px;" />
<asp:ImageButton ID="ImageFindSupplier" runat="server" Style="z-index: 103; left: 625px;
position: absolute; top: 60px; width: 25px; height: 25px;" ImageUrl="~/Images/Find.gif"
CommandName="MainSearch" OnCommand="ImageFindSupplier_Command" />
<asp:Label ID="Label9" runat="server" Style="z-index: 103; left: 10px; position: absolute;
top: 100px; width: 50px;">Address</asp:Label>
<asp:TextBox ID="TextBoxAddress" runat="server" Style="z-index: 100; left: 80px;
position: absolute; top: 100px; width: 550px;" />
<asp:Label ID="Label8" runat="server" Style="z-index: 103; left: 10px; position: absolute;
top: 140px; width: 50px;">Invoice Date</asp:Label>
<asp:TextBox ID="TextBoxInvoiceDate" runat="server" Style="z-index: 100; left: 80px;
position: absolute; top: 140px; width: 100px; right: 520px;" />
<asp:CalendarExtender ID="TextBoxInvoiceDate_CalendarExtender" runat="server"
Enabled="True" TargetControlID="TextBoxInvoiceDate">
</asp:CalendarExtender>
<asp:Label ID="Label18" runat="server" Style="z-index: 103; left: 200px; position: absolute;
top: 140px; width: 50px;">Delivery Date</asp:Label>
<asp:TextBox ID="TextBoxDeliveryDate" runat="server" Style="z-index: 100; left: 300px;
position: absolute; top: 140px; width: 100px; right: 520px;" />
<asp:CalendarExtender ID="TextBoxDeliveryDate_CalendarExtender" runat="server"
Enabled="True" TargetControlID="TextBoxDeliveryDate">
</asp:CalendarExtender>
<asp:Label ID="Label10" runat="server" Style="z-index: 103; left: 10px; position: absolute;
top: 180px; width: 50px;">Comment</asp:Label>
<asp:TextBox ID="TextBoxComment" runat="server" Style="z-index: 100; left: 80px;
position: absolute; top: 180px; width: 550px;" TextMode="MultiLine" Rows="2" />
<%-- <asp:Button ID="ButtonSave" runat="server" Text="Save" Style="z-index: 100; left: 50px;
position: relative; top: 250px" Width="50px" ValidationGroup="save"/>--%>
<%-- <asp:Button ID="ButtonSave" runat="server" Text="Save" Style="z-index: 100; left: 50px;
position: absolute; top: 250px" Width="50px" ValidationGroup="save"/>--%>
</div>
</asp:View>
<asp:View ID="View2" runat="server">
<div style="border-style: solid; border-width: 1px; border-color: inherit; z-index: 100;
left: 1px; width: 725px; position: relative; top: 1px; height: 250px;">
<asp:Label ID="Label7" runat="server" Style="z-index: 103; left: 10px; position: absolute;
top: 20px; width: 100px; right: 615px;">Supplier Code</asp:Label>
<asp:TextBox ID="TextBoxSupplierCode" runat="server" Width="100px" Style="z-index: 100;
left: 125px; position: absolute; top: 20px" />
<asp:Label ID="Label5" runat="server" Style="z-index: 103; left: 315px; position: absolute;
top: 20px; width: 100px;">Supplier Name</asp:Label>
<asp:TextBox ID="TextBoxSupp_Name" runat="server" Style="z-index: 100; left: 420px;
position: absolute; top: 20px; width: 250px;" />
<asp:ImageButton ID="ImageButtonSupSearch" runat="server" Style="z-index: 103; left: 675px;
position: absolute; top: 20px; width: 25px;" ImageUrl="~/Images/Find.gif" OnClick="ImageButtonSupSearch_Click"
CommandName="SubSearch" TabIndex="1" />
<asp:ImageButton ID="ImageButtonClose" runat="server" Style="z-index: 103; left: 700px;
position: absolute; top: 1px; height: 15px;" ImageUrl="~/Images/close.gif" CommandName="closeSearch"
OnCommand="ImageButtonClose_Command" />
<asp:UpdatePanel ID="updatepnlSupplier" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:GridView ID="GridViewSupplier" runat="server" AllowPaging="True" AutoGenerateColumns="False"
SkinID="GridView" Style="z-index: 111; left: 175px; position: absolute; top: 50px"
Width="317px" ShowFooter="True" PageSize="5" DataKeyNames="supplierID" OnPageIndexChanging="GridViewSupplier_PageIndexChanging"
OnSelectedIndexChanged="GridViewSupplier_SelectedIndexChanged">
<columns>
<%--<asp:HyperLinkField DataNavigateUrlFields="supplierID" runat="server" DataNavigateUrlFormatString="PurchaseOrder.aspx?supplierID={0}"
Text="Select" />--%>
<asp:CommandField ButtonType="Link" ShowSelectButton="True">
<ItemStyle Width="50px" HorizontalAlign="Center" VerticalAlign="Middle"></ItemStyle>
</asp:CommandField>
<asp:TemplateField HeaderText="Supplier ID" Visible="false">
<ItemTemplate>
<%# Eval("supplierID")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Supplier Name">
<ItemTemplate>
<%# Eval("supplierName")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Contact No">
<ItemTemplate>
<%# Eval("supplierContactNo")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Email">
<ItemTemplate>
<%# Eval("supplierEmail")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="">
<ItemTemplate>
<asp:CheckBox runat="server" ID="chbRL" Text="" Checked='<%# Eval("active")%> ' />
</ItemTemplate>
</asp:TemplateField>
</columns>
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</asp:View>
</asp:MultiView>
<asp:MultiView ID="MultiViewItem" runat="server">
<asp:View ID="View3" runat="server">
<div style="z-index: 100; left: 1px; width: 725px; position: relative; top: 5px;
height: 250px;">
<asp:Label ID="Label11" runat="server" Style="z-index: 103; left: 10px; position: absolute;
top: 20px; width: 100px;">Item Code</asp:Label>
<asp:TextBox ID="TextBoxItemCode" runat="server" Width="100px" Style="z-index: 100;
left: 125px; position: absolute; top: 20px" />
<asp:Label ID="Label12" runat="server" Style="z-index: 103; left: 315px; position: absolute;
top: 20px; width: 100px;">Item Name</asp:Label>
<asp:TextBox ID="TextBoxItemName" runat="server" Style="z-index: 100; left: 420px;
position: absolute; top: 20px; width: 250px;" />
<asp:ImageButton ID="ImageButtonFindItem" runat="server" Style="z-index: 103; left: 675px;
position: absolute; top: 20px; width: 25px;" ImageUrl="~/Images/Find.gif" CommandName="SubSearchItem"
TabIndex="1" OnCommand="ImageButtonFindItem_Command" />
<asp:Label ID="Label15" runat="server" Style="z-index: 103; left: 10px; position: absolute;
top: 50px; width: 100px;">UOM</asp:Label>
<%-- <asp:TextBox ID="TextBoxUOM" runat="server" Width="100px" Style="z-index: 100; left: 125px;
position: absolute; top: 50px" />--%>
<asp:DropDownList ID="DropDownListUOM" runat="server" Style="z-index: 100; left: 125px;
position: absolute; top: 50px" Width="109px" />
<asp:Label ID="Label16" runat="server" Style="z-index: 103; left: 235px; position: absolute;
top: 50px; width: 50px;">Quantity</asp:Label>
<asp:TextBox ID="TextBoxQty" runat="server" Width="100px" Style="z-index: 100; left: 300px;
position: absolute; top: 50px" />
<asp:Label ID="Label17" runat="server" Style="z-index: 103; left: 420px; position: absolute;
top: 50px; width: 50px;">Price</asp:Label>
<asp:TextBox ID="TextBoxPrice" runat="server" Width="100px" Style="z-index: 100;
left: 475px; position: absolute; top: 50px" />
<asp:ImageButton ID="ImageButtonAddItem" runat="server" Style="z-index: 103; left: 675px;
position: absolute; top: 50px; width: 25px; height: 25px" ImageUrl="~/Images/smallnew.gif"
CommandName="AddItem" OnClick="ImageButtonAddItem_Click" CausesValidation="true"/>
<asp:GridView ID="GridViewPurchaseOrder" runat="server" AutoGenerateColumns="False"
SkinID="GridView" Style="z-index: 111; left: 175px; position: absolute; top: 80px"
Width="317px" ShowFooter="True" PageSize="2"
onrowdeleting="GridViewPurchaseOrder_RowDeleting">
<Columns>
<asp:CommandField ShowDeleteButton="True">
<ItemStyle Width="50px" HorizontalAlign="Center" VerticalAlign="Middle"></ItemStyle>
</asp:CommandField>
<asp:CommandField ButtonType="Link" ShowSelectButton="True">
<ItemStyle Width="50px" HorizontalAlign="Center" VerticalAlign="Middle"></ItemStyle>
</asp:CommandField>
<asp:TemplateField HeaderText="Item ID" Visible="false">
<ItemTemplate>
<%# Eval("ItemDetail.itemID")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Item Name">
<ItemTemplate>
<%# Eval("ItemDetail.ItemDesc")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Item Sales Price">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "ItemDetail.itemSalesPrice", "{0,0:0.00}")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="UOM">
<ItemTemplate>
<%# Eval("ItemUOM")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Quantity">
<ItemTemplate>
<%# Eval("POQty")%>
</ItemTemplate>
</asp:TemplateField>
<%-- <asp:TemplateField HeaderText="">
<ItemTemplate>
<asp:CheckBox runat="server" ID="chbRL" Text="" Checked='<%# Eval("active")%> ' />
</ItemTemplate>
</asp:TemplateField>--%>
</Columns>
</asp:GridView>
<asp:Button ID="ButtonSave" runat="server" Text="Save" Style="z-index: 100; left: 170px;
position: absolute; top: 275px; height: 26px;" Width="50px" ValidationGroup="save"
OnClick="ButtonSave_Click" />
<asp:Button ID="ButtonUpdate" runat="server" Text="Update" Style="z-index: 100; left: 230px;
position: absolute; top: 275px" Width="60px" ValidationGroup="save" OnClick="ButtonUpdate_Click" />
<asp:Button ID="ButtonRest" runat="server" Text="Reset" Style="z-index: 100; left: 300px;
position: absolute; top: 275px; height: 26px;" Width="50px" OnClick="ButtonRest_Click" />
<asp:Button ID="ButtonCancel" runat="server" Text="Cancel" Style="z-index: 100; left: 360px;
position: absolute; top: 275px" Width="50px" OnClick="ButtonCancel_Click" />
<asp:Label ID="lblMsg" runat="server" Style="z-index: 103; left: 180px; position: absolute;
top: 250px; width: 325px; right: 431px;" Font-Bold="True" ForeColor="Blue"></asp:Label>
</div>
</asp:View>
<asp:View ID="View4" runat="server">
<div style="border-style: solid; border-width: 1px; border-color: inherit; z-index: 100;
left: 1px; width: 725px; position: relative; top: 5px; height: 250px;">
<asp:Label ID="Label13" runat="server" Style="z-index: 103; left: 10px; position: absolute;
top: 20px; width: 100px;">Item Code</asp:Label>
<asp:TextBox ID="TextBoxSearchItemCode" runat="server" Width="100px" Style="z-index: 100;
left: 125px; position: absolute; top: 20px" />
<asp:Label ID="Label14" runat="server" Style="z-index: 103; left: 315px; position: absolute;
top: 20px; width: 100px;">Item Name</asp:Label>
<asp:TextBox ID="TextBoxSearchItemName" runat="server" Style="z-index: 100; left: 420px;
position: absolute; top: 20px; width: 250px;" />
<asp:ImageButton ID="ImageButtonIt_Search" runat="server" Style="z-index: 103; left: 675px;
position: absolute; top: 20px; width: 25px;" ImageUrl="~/Images/Find.gif" CommandName="SubSearchItem"
TabIndex="1" OnClick="ImageButtonIt_Search_Click" />
<asp:ImageButton ID="ImageButtonItemClose" runat="server" Style="z-index: 103; left: 700px;
position: absolute; top: 1px; height: 15px;" ImageUrl="~/Images/close.gif" CommandName="closeItSearch"
OnCommand="ImageButtonItemClose_Command" />
<asp:GridView ID="GridViewItem" runat="server" AllowPaging="True" AutoGenerateColumns="False"
SkinID="GridView" Style="z-index: 111; left: 175px; position: absolute; top: 50px"
Width="317px" ShowFooter="True" PageSize="5" DataKeyNames="itemID" OnPageIndexChanging="GridViewItem_PageIndexChanging"
OnSelectedIndexChanged="GridViewItem_SelectedIndexChanged">
<Columns>
<asp:CommandField ButtonType="Link" ShowSelectButton="True">
<ItemStyle Width="50px" HorizontalAlign="Center" VerticalAlign="Middle"></ItemStyle>
</asp:CommandField>
<asp:TemplateField HeaderText="Item ID" Visible="false">
<ItemTemplate>
<%# Eval("itemID")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Item Name">
<ItemTemplate>
<%# Eval("ItemDesc")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Item Category Name">
<ItemTemplate>
<%# Eval("ItemCategory.itemCatName")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Item Sales Price">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "itemSalesPrice", "{0,0:0.00}")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Reorder Level">
<ItemTemplate>
<%# Eval("itemReorder")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Item Cost Price">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem, "itemCostPrice", "{0,0:0.00}")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="">
<ItemTemplate>
<asp:CheckBox runat="server" ID="chbRL" Text="" Checked='<%# Eval("active")%> ' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</asp:View>
</asp:MultiView>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</asp:Content>
需要一些指导
答案 0 :(得分：0)
我想你可以做这样的事情......添加断点并检查它是否进入其他部分
protected void ImageButtonAddItem_Click(object sender, ImageClickEventArgs e)
{
if (TextBoxItemCode.Text == "")
{
labelerror.Text = "Please select an item to Add .";
}
else
{
poDetails.Add(
new PurchaseOrderDetail
{
ItemDetail = new ItemService().GetItemByID(Convert.ToInt32(TextBoxItemCode.Text.Trim())),
POQty = Convert.ToInt32(TextBoxQty.Text),
ItemUOM = DropDownListUOM.SelectedItem.Text,
ActiveStatus = true
}
);
GridViewPurchaseOrder.DataSource = poDetails;
GridViewPurchaseOrder.DataBind();
}
}
你的页面加载其他部分刷新你的标签错误，这部分..
else
{
labelerror.Text = "";
LockControls(true);
}
最好使用不同的标签，或在
中写下你的代码protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
//all ur page load code
}
}
答案 1 :(得分：0)
因为您的标签位于更新面板“upnlSerachSupplier”之外。您必须在标签周围使用更新面板，如下所示：
<asp:UpdatePanel runat="server" ID="upnl1" UpdateMode="Always">
<ContentTemplate>
<asp:Label ID="labelerror" runat="server" Text="Error" CssClass="errorLabel"
EnableViewState="False"></asp:Label>
<ContentTemplate>
</asp:UpdatePanel>
看看：
https://msdn.microsoft.com/en-us/library/system.web.ui.updatepanel.updatemode(v=vs.110).aspx