Я занимаюсь разработкой сайтов на C # VS 2008 и SQL Server 2008. Тем не менее, я получаю ошибку ниже, когда я впервые запускаю это:
The DataSourceID of 'GridView1' must be the ID of a control of type
IDataSource. A control with ID 'AdventureWorks3.mdf' could not be found
Что вызывает эту ошибку? Вот мой файл default.aspx. Я настроил GridView1 для использования моего файла AdventureWorks3.mdf, хранящегося в моей папке App_Data. Нужно ли добавлять это имя папки в этот файл ASPX?
<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" Title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" Runat="Server">
<asp:Panel runat="server" ID="AuthenticatedMessagePanel">
<asp:Label runat="server" ID="WelcomeBackMessage"></asp:Label>
<table>
<tr >
<td>
<asp:Label ID="tableLabel" runat="server" Font-Bold="True"
Text="Select target table:"></asp:Label>
</td>
<td>
<asp:Label ID="inputLabel" runat="server" Font-Bold="True"
Text="Select input file:"></asp:Label>
</td></tr>
<tr><td valign="top">
<asp:Label ID="feedbackLabel" runat="server"></asp:Label>
<asp:SqlDataSource ID="SelectTables" runat="server"
ConnectionString="<%$ ConnectionStrings:AdventureWorks3_SelectTables %>"
SelectCommand="SELECT TABLE_NAME
FROM information_schema.Tables
WHERE TABLE_TYPE = 'BASE TABLE' AND TABLE_SCHEMA = @SchemaName">
<SelectParameters>
<asp:FormParameter DefaultValue="Address" FormField="upload"
Name="SchemaName" />
</SelectParameters>
</asp:SqlDataSource>
<asp:GridView ID="GridView1" DatasourceID="SelectTables" runat="server" style="WIDTH: 400px;"
CellPadding="4" ForeColor="#333333"
GridLines="None" onselectedindexchanged="GridView1_SelectedIndexChanged"
AutoGenerateSelectButton="True" DataKeyNames="TABLE_NAME">
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<Columns>
<asp:BoundField HeaderText="Table_Name" />
</Columns>
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#999999" />
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
</asp:GridView>
</td>
<td valign="top">
<input id="uploadFile" type="file" size="26" runat="server" name="uploadFile"
title="UploadFile" class="greybar"
enableviewstate="True" />
</td></tr>
</table>
</asp:Panel>
<asp:Panel runat="Server" ID="AnonymousMessagePanel">
<asp:HyperLink runat="server" ID="lnkLogin" Text="Log In" NavigateUrl="~/Login.aspx">
</asp:HyperLink>
</asp:Panel> </asp:Content>
Или как насчет моего файла ASPX.CS? Это проблема?
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Collections.Generic;
using System.IO;
using System.Drawing;
using System.ComponentModel;
using System.Data.SqlClient;
using ADONET_namespace;
using System.Security.Principal;
//using System.Windows;
public partial class _Default : System.Web.UI.Page
//namespace AddFileToSQL
{
//protected System.Web.UI.HtmlControls.HtmlInputFile uploadFile;
protected System.Web.UI.HtmlControls.HtmlInputButton btnOWrite;
protected System.Web.UI.HtmlControls.HtmlInputButton btnAppend;
protected System.Web.UI.WebControls.Label Label1;
protected static string inputfile = "";
public static string targettable;
public static string selection;
// Number of controls added to view state
protected int default_NumberOfControls
{
get
{
if (ViewState["default_NumberOfControls"] != null)
{
return (int)ViewState["default_NumberOfControls"];
}
else
{
return 0;
}
}
set
{
ViewState["default_NumberOfControls"] = value;
}
}
protected void uploadFile_onclick(object sender, EventArgs e)
{
}
protected void Load_GridData()
{
//GridView1.DataSource = ADONET_methods.DisplaySchemaTables();
//GridView1.DataBind();
}
protected void btnOWrite_Click(object sender, EventArgs e)
{
if (uploadFile.PostedFile.ContentLength > 0)
{
feedbackLabel.Text = "You do not have sufficient access to overwrite table records.";
}
else
{
feedbackLabel.Text = "This file does not contain any data.";
}
}
protected void btnAppend_Click(object sender, EventArgs e)
{
string fullpath = Page.Request.PhysicalApplicationPath;
string path = uploadFile.PostedFile.FileName;
if (File.Exists(path))
{
// Create a file to write to.
try
{
StreamReader sr = new StreamReader(path);
string s = "";
while (sr.Peek() > 0)
s = sr.ReadLine();
sr.Close();
}
catch (IOException exc)
{
Console.WriteLine(exc.Message + "Cannot open file.");
return;
}
}
if (uploadFile.PostedFile.ContentLength > 0)
{
inputfile = System.IO.File.ReadAllText(path);
Session["Message"] = inputfile;
Response.Redirect("DataMatch.aspx");
}
else
{
feedbackLabel.Text = "This file does not contain any data.";
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (Request.IsAuthenticated)
{
WelcomeBackMessage.Text = "Welcome back, " + User.Identity.Name + "!";
// Reference the CustomPrincipal / CustomIdentity
CustomIdentity ident = User.Identity as CustomIdentity;
if (ident != null)
WelcomeBackMessage.Text += string.Format(" You are the {0} of {1}.", ident.Title, ident.CompanyName);
AuthenticatedMessagePanel.Visible = true;
AnonymousMessagePanel.Visible = false;
if (!Page.IsPostBack)
{
Load_GridData();
}
}
else
{
AuthenticatedMessagePanel.Visible = false;
AnonymousMessagePanel.Visible = true;
}
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow row = GridView1.SelectedRow;
targettable = row.Cells[2].Text;
}
}