我在ASP.Net工作。我试图将会话变量传递给gridview控件。当我删除会话变量参数时，我用来提供gridview的下拉列表正常工作。当我添加会话变量时，它会显示所有内容。
这是我的页面加载事件背后的代码（我使用的是VB.net）：
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
Dim ScreenerID As Int32
Dim intS As Int32
Session("ScreenerID") = 20
intS = CType(Session.Item("ScreenerID"), Int32)
End Sub
我的ASP.Net代码如下：
<%@ Page Title="Home Page" Language="VB" AutoEventWireup="true" CodeBehind="Default.aspx.vb" Inherits="SAP._Default" %>
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="cc1" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Screening Portal</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<cc1:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</cc1:ToolkitScriptManager>
<cc1:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="0">
<cc1:TabPanel ID="TabPanel1" runat="server" HeaderText="Screening">
<ContentTemplate>
<asp:Label ID="Label2" runat="server" Text="Pull For Screening "></asp:Label>
<asp:DropDownList ID="DropDownList1" runat="server"><asp:ListItem>10</asp:ListItem>
<asp:ListItem>20</asp:ListItem>
</asp:DropDownList>
<asp:Button ID="Button1" runat="server" Text="Add Applicants" />
<asp:Label ID="Label3" runat="server" Text="Choose Campus: "></asp:Label>
<asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList2_SelectedIndexChanged">
<asp:ListItem Text="All" Value=""></asp:ListItem>
<asp:ListItem>CRC</asp:ListItem>
<asp:ListItem>GHS</asp:ListItem>
<asp:ListItem>STL</asp:ListItem>
<asp:ListItem>WPH</asp:ListItem>
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:ScreenerView %>" ProviderName="<%$ ConnectionStrings:ScreenerView.ProviderName %>"
SelectCommand="SELECT [ScreenerID], [LEGAL_FNAME], [LEGAL_LNAME], [APPL_PERSON_ID], [AAMC_ID], [GENDER], [URM], [RecMCAT], [SciGPA], [LEGAL_RES_STATE_CD], [PullDate], [First] FROM [vw_Screener]"
FilterExpression="ScreenerID = {0} AND First='{1}'">
<FilterParameters>
<asp:Parameter Name="intS" Type="int32" />
<asp:ControlParameter ControlID="DropDownList2" PropertyName="SelectedValue" Type="String" DefaultValue=""/>
</FilterParameters>
</asp:SqlDataSource>
<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" DataSourceID="SqlDataSource1" CellPadding="4" ForeColor="#333333" GridLines="None">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:BoundField DataField="ScreenerID" HeaderText="ScreenerID" SortExpression="ScreenerID" Visible="False"></asp:BoundField>
<asp:BoundField DataField="LEGAL_FNAME" HeaderText="First Name" SortExpression="LEGAL_FNAME" />
<asp:BoundField DataField="LEGAL_LNAME" HeaderText="Last Name" SortExpression="LEGAL_LNAME" />
<asp:BoundField DataField="APPL_PERSON_ID" HeaderText="APPL_PERSON_ID" SortExpression="APPL_PERSON_ID" Visible="False" />
<asp:BoundField DataField="AAMC_ID" HeaderText="AAMC" SortExpression="AAMC_ID" />
<asp:BoundField DataField="GENDER" HeaderText="Gender" SortExpression="GENDER" />
<asp:BoundField DataField="URM" HeaderText="URM" SortExpression="URM" />
<asp:BoundField DataField="RecMCAT" HeaderText="MCAT" SortExpression="RecMCAT" />
<asp:BoundField DataField="SciGPA" HeaderText="Sci. GPA" SortExpression="SciGPA" />
<asp:BoundField DataField="LEGAL_RES_STATE_CD" HeaderText="State" SortExpression="LEGAL_RES_STATE_CD" />
<asp:BoundField DataField="PullDate" HeaderText="Date Pulled" DataFormatString = "{0:d}" SortExpression="PullDate" />
<asp:BoundField DataField="First" HeaderText="First Choice CC" SortExpression="First" />
</Columns>
<EditRowStyle BackColor="#2461BF" />
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#EFF3FB" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#F5F7FB" />
<SortedAscendingHeaderStyle BackColor="#6D95E1" />
<SortedDescendingCellStyle BackColor="#E9EBEF" />
<SortedDescendingHeaderStyle BackColor="#4870BE" />
</asp:GridView>
</ContentTemplate>
</cc1:TabPanel>
<cc1:TabPanel ID="TabPanel2" runat="server" HeaderText="Query">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="Search "></asp:Label><asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</ContentTemplate>
</cc1:TabPanel>
<cc1:TabPanel ID="TabPanel3" runat="server" HeaderText="Manage Invitations">
<ContentTemplate>
</ContentTemplate>
</cc1:TabPanel>
<cc1:TabPanel ID="TabPanel4" runat="server" HeaderText="Reports">
<ContentTemplate>
</ContentTemplate>
</cc1:TabPanel>
<cc1:TabPanel ID="TabPanel5" runat="server" HeaderText="Admin">
<ContentTemplate>
</ContentTemplate>
</cc1:TabPanel>
</cc1:TabContainer>
<br />
</div>
</form>
</body>
</html>
我想我正在做一些简单的事情需要快速解决，但它超出了我的范围。谢谢。
答案 0 :(得分：0)
由于 intS 变化不大，为什么不将它提供给select语句而不是应用filter参数？ 您的想法是什么？
ASPX SqlDataSource1：
SelectCommand="SELECT [ScreenerID], [LEGAL_FNAME], [LEGAL_LNAME],
[APPL_PERSON_ID], [AAMC_ID], [GENDER], [URM], [RecMCAT], [SciGPA], [LEGAL_RES_STATE_CD],
[PullDate], [First]
FROM [vw_Screener]
WHERE [First] = @First" <-- Notice the WHERE Clause
从 FilterParameters 中删除<asp:Parameter Name="intS" Type="int32" />，然后将FilterExpression更改为：
FilterExpression="First='{0}'"
但您必须在[strong> SelectParameters 部分中添加[First]作为参数，如下所示：
<SelectParameters>
<asp:Parameter Name="First" />
</SelectParameters>
VB.NET代码隐藏：
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
Dim ScreenerID As Int32
Dim intS As Int32
Session("ScreenerID") = 20
intS = CType(Session.Item("ScreenerID"), Int32)
SqlDataSource1.SelectParameters.Add("@First ",intS) '<-- Here is where we set intS
End Sub