Question

我在Visual Studio 2010中创建了一个网站。在网页上，我想在gridview中显示日期。当我去配置数据源时，我使用查询构建器来获取我想要的数据 - 即，我想显示当前登录的用户的所有记录。用户是从Windows登录确定的。我的Select语句是：

SELECT tblWorkHours.EmployeeName, tblWorkHours.BeginDateOff, tblWorkHours.EndDateOff,    
tblWorkHours.AllDay_YesNo, tblWorkHours.BeginTimeOff, tblWorkHours.EndTimeOff,  
tblWorkHours.Approved, tblCodesWork.Description, tblEmployees.Login FROM tblWorkHours INNER JOIN 
tblCodesWork ON tblWorkHours.WorkCode = tblCodesWork.WorkCodeID INNER JOIN tblEmployees ON 
tblWorkHours.Employee = tblEmployees.EmployeeID WHERE (tblEmployees.Login = @username) ORDER BY 
tblWorkHours.BeginDateOff DESC

当我在“配置数据源”向导中测试查询时，查询将返回正确的数据。当我运行网页时，没有gridview。我尝试在网页上添加一个字段，以确保我获得了正确的用户名，这是有效的。我究竟做错了什么？任何帮助将不胜感激！

以下是我的网页代码：

<%@ Page Title="" Language="vb" AutoEventWireup="false" MasterPageFile="~/Site.Master"   
CodeBehind="TimeOffAllByUser.aspx.vb" Inherits="timework.TimeOffAllByUser" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<asp:GridView ID="GridView1" runat="server" 
    DataSourceID="SqlDataSource1" AllowPaging="True" AllowSorting="True">
    <Columns>
        <asp:BoundField DataField="EmployeeName" HeaderText="EmployeeName" 
            SortExpression="EmployeeName">
        </asp:BoundField>
        <asp:BoundField DataField="BeginDateOff" 
            HeaderText="BeginDateOff" SortExpression="BeginDateOff">
        </asp:BoundField>
        <asp:BoundField DataField="EndDateOff" 
            HeaderText="EndDateOff" SortExpression="EndDateOff">
        </asp:BoundField>
        <asp:CheckBoxField DataField="AllDay_YesNo" HeaderText="AllDay_YesNo" 
            SortExpression="AllDay_YesNo">
        </asp:CheckBoxField>
        <asp:BoundField DataField="BeginTimeOff" 
            HeaderText="BeginTimeOff" SortExpression="BeginTimeOff">
        </asp:BoundField>
        <asp:BoundField DataField="EndTimeOff" 
            HeaderText="EndTimeOff" SortExpression="EndTimeOff">
        </asp:BoundField>
        <asp:CheckBoxField DataField="Approved" HeaderText="Approved" 
            SortExpression="Approved">
        </asp:CheckBoxField>
        <asp:BoundField DataField="Description" HeaderText="Description" 
            SortExpression="Description">
        </asp:BoundField>
        <asp:DynamicField DataField="Login" HeaderText="Login" />
    </Columns>
</asp:GridView>

<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
    ConnectionString="<%$ ConnectionStrings:TimeSQLConnectionString1 %>" 
    SelectCommand="SELECT tblWorkHours.EmployeeName, tblWorkHours.BeginDateOff, 
    tblWorkHours.EndDateOff, tblWorkHours.AllDay_YesNo, tblWorkHours.BeginTimeOff, 
    tblWorkHours.EndTimeOff, tblWorkHours.Approved, tblCodesWork.Description, tblEmployees.Login 
    FROM tblWorkHours INNER JOIN tblCodesWork ON tblWorkHours.WorkCode = tblCodesWork.WorkCodeID 
    INNER JOIN tblEmployees ON tblWorkHours.Employee = tblEmployees.EmployeeID WHERE 
   (tblEmployees.Login = @username) ORDER BY tblWorkHours.BeginDateOff DESC" >
    <SelectParameters>
        <asp:QueryStringParameter Name="username" 
            QueryStringField="Split(HttpContext.Current.User.Identity.Name, quot;\&quot;, ,  
            CompareMethod.Text)" 
            Type="String" />
    </SelectParameters>
</asp:SqlDataSource>

vb代码是：

    Imports System
    Imports System.Data
    Imports System.Data.OleDb
    Imports System.Data.SqlClient
    Imports System.Configuration
    Imports System.Web.Mvc
    Public Class TimeOffAllByUser
        Inherits System.Web.UI.Page
        Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

            Dim vusername() As String

            vusername = Split(HttpContext.Current.User.Identity.Name, "\", , CompareMethod.Text)
            'TextBox1.Text = (vusername(1))

        End Sub

End Class

Answer 1

好的，我认为问题在于你使用的是QueryStringParameter，而在querystring字段中你使用的是表达式，这可能不起作用。你可以做的是

将QueryStringParameter更改为普通参数

<asp:Parameter Name="username"  />

在您的DataSource声明中添加选择事件

OnSelecting="SqlDataSource1_Selecting"

在选择事件中指定参数值

Protected Sub SqlDataSource1_Selecting(ByVal sender as Object, ByVal e As SqlDataSourceSelectingEventArgs )

     Dim vusername() As String
     vusername = Split(HttpContext.Current.User.Identity.Name, "\", , CompareMethod.Text)
     e.Command.Parameters["@username"].Value=vusername(1)
End Sub

在网站的Gridview中选择Statement不起作用

1 个答案: