单击跨页PostBack事件
本文关键字：事件 PostBack 单击 | 更新日期: 2023-09-27 18:29:42
我有一个包含TextBox和按钮的Search.aspx页面。postback是指具有GridView的Results.aspx。Sql查询的工作原理与我使用QueryDesigner检查过的一样。
理论上，伪搜索应该通过在文本框中键入值并单击按钮来完成。当我输入一个值并单击时，Results.aspx页面将打开，但为空白。
Search.aspx中的点击事件无非是：
protected void Button2_Click(object sender, EventArgs e){}
此设置在Web项目中有效，但在网站中无效。如果不将值提交到Results.aspx页面，则单击事件似乎不起作用。我一直没有找到一个点击事件，这将工作。如果有任何帮助，我将不胜感激。
编辑：sql查询很复杂，但正如我所说，当在查询设计器中输入值时，它可以正常工作。我确实在.cs中添加了一个"名称空间"，因为网站通常没有名称空间，而不是Web项目。
Search.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Search.aspx.cs" Inherits="LinqTest.Search" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<!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:TextBox runat="server" ID="Name"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Search" PostBackUrl="~/Results.aspx" />
</div>
</form>
</body>
</html>
搜索.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace LinqTest
{
public partial class Search : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
}
}
}
ResultsSearch.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ResultsSearch.aspx.cs" Inherits="RecipeFaire.ResultsSearch" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<%@ PreviousPageType VirtualPath="~/Search.aspx" %>
<!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 id="Head1" runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<!-- this is the results of the search done on the search.aspx -->
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:ListView ID="ListView1" runat="server" DataKeyNames="RecipeID" DataSourceID="SqlDataSource1">
<ItemTemplate>
<tr>
<td rowspan="2">
<asp:Image ID="Image1" runat="server" Width="100px" Height="80px" ImageUrl='<%# "~/Handler.ashx?RecipeID=" + Eval("RecipeID")%>' />
</td>
<td rowspan="2" width="100px">
<asp:Rating ID="Rating1" runat="server" align="right" valign="top" CurrentRating='<%# Eval("RatingAVG")%>'
MaxRating="5" ReadOnly="true" StarCssClass="ratingStar" WaitingStarCssClass="savedRatingStar"
FilledStarCssClass="filledRatingStar" EmptyStarCssClass="emptyRatingStar">
</asp:Rating>
   <br></br>
<asp:Label ID="Label7" runat="server" align="right" Text='<%# Eval("Count") %>' />  
<asp:HyperLink ID="Home" Font-Size="Small" runat="server" NavigateUrl='<%# Bind("RecipeID", "../../Comments.aspx?RecipeId={0}") %>'
Text="Reviews" />
</td>
<td>
<asp:HyperLink ID="HyperLink2" runat="server" NavigateUrl='<%# Bind("RecipeID", "PageLinkDetails.aspx?RecipeId={0}") %>'
Text='<%# Eval("RecipeName") %>'></asp:HyperLink>
</td>
</tr>
<tr style="width: 500px">
<td>
<asp:Label ID="DescriptionLabel" valign="top" runat="server" Text='<%# Eval("Description") %>' />
</td>
</tr>
<tr>
<td colspan="5" style="color: LightGrey">
<asp:Label ID="Label2" runat="server" Font-Size="1px" Height="1px" Text='<%# Eval("RecipeID") %>'></asp:Label>
<hr style="border-style: dotted" />
</td>
</tr>
</ItemTemplate>
<LayoutTemplate>
                         <asp:LinkButton
runat="server" ID="SortByName" CommandName="Sort" CommandArgument="RecipeName">Sort By Recipe Name</asp:LinkButton>
              
<asp:LinkButton runat="server" ID="SortByPrice" CommandName="Sort" CommandArgument="RatingAVG">Sort By Rating</asp:LinkButton>
<table id="Table1" runat="server">
<tr id="Tr1" runat="server">
<td id="Td1" runat="server">
<table id="itemPlaceholderContainer" runat="server" border="0" style="">
<tr id="Tr2" runat="server" style="">
<th id="Th1" runat="server">
</th>
</tr>
<tr id="itemPlaceholder" runat="server">
</tr>
</table>
</td>
</tr>
<tr id="Tr3" runat="server">
<td id="Td2" runat="server" style="" align="center">
<asp:DataPager ID="DataPager2" PagedControlID="ListView1" PageSize="8" runat="server">
<Fields>
<asp:NumericPagerField ButtonCount="8" />
</Fields>
</asp:DataPager>
</td>
</tr>
</table>
</LayoutTemplate>
</asp:ListView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:RecipeUploadConnectionString %>"
SelectCommand="SELECT pr.RecipeID, pr.CategoryName, pr.CategoryType, pr.RecipeName, pr.Description, COUNT(rr.RecipeID) AS Count, AVG(rr.Rating) AS RatingAVG
FROM PostedRecipes AS pr LEFT OUTER JOIN RecipeRatings AS rr ON pr.RecipeID = rr.RecipeID
WHERE pr.RecipeName LIKE '%' + @RecipeName + '%' OR pr.CategoryName LIKE '%' + @CategoryName + '%'
OR pr.CategoryType LIKE '%' + @CategoryType + '%' OR pr.CuisineOrigin LIKE '%' + @CuisineOrigin + '%'
OR pr.CuisineType LIKE '%' + @CuisineType + '%' GROUP BY pr.RecipeID, pr.RecipeName, pr.CategoryName, pr.CategoryType, pr.CuisineOrigin, pr.CuisineType, pr.Description">
<SelectParameters>
<asp:FormParameter FormField="RecipeName" Name="RecipeName" Type="String"/>
<asp:FormParameter FormField="CategoryName" Name="CategoryName" Type="String" />
<asp:FormParameter FormField="CategoryType" Name="CategoryType" Type="String"/>
<asp:FormParameter FormField="CuisineOrigin" Name="CuisineOrigin" Type="String" />
<asp:FormParameter FormField="CuisineType" Name="CuisineType" Type="String"/>
</SelectParameters>
</asp:SqlDataSource>
</div>
</form>
</body>
</html>
结果搜索.cs
using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Text;
using System.Web.SessionState;
namespace RecipeFaire
{
public partial class ResultsSearch : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
}
}
我看到了一些奇怪的东西。。。
在你的search.aspx中…你有这个。
<asp:Button ID="Button1" runat="server" Text="Search" PostBackUrl="~/Results.aspx" />
然而，在您的第二页列表中。。。你发布了这个。。。
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ResultsSearch.aspx.cs" Inherits="RecipeFaire.ResultsSearch" %>
PostbackUrl是Results.aspx，您在ResultsSearch.aspx中发布的其他页面。
你能检查一下这是否有问题吗？（我还不能发表评论。）
您肯定没有向我们展示您所有的代码，但我们会假设您在某个地方这样做：
ListView1.DataSource = SqlDataSource1;
ListView1.DataBind();
完成后，THEN您可以找到Label并设置其文本（在绑定之前不要在Page_Load中执行此操作）。
protected void ListView1_ItemDataBound(object sender, ListViewItemEventArgs e)
{
if (e.Item.ItemType == ListViewItemType.DataItem)
{
Label recipeName = (Label)e.Item.FindControl("labRecipeName");
recipeName.Text = Request.QueryString["RecipeName"].ToString()
}
}
要为SqlDataSource使用查询字符串值，请使用QueryStringParameter:
<SelectParameters>
<asp:QueryStringParameter Name="RecipeName" QueryStringField="RecipeName" Type="String" />
</SelectParameters>