ASP.NET Tutorial/ADO.net Database/OleDbConnection — различия между версиями
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Текущая версия на 11:56, 26 мая 2010
Connecting to an Access Database
<%@ Import namespace="System.Data" %>
<%@ Import namespace="System.Data.OleDb" %>
<%@ Page debug="true" %>
<html>
<head>
<title>Connecting to an Access Database</title>
</head>
<body>
<H3>Connecting to an Access Database</H3>
<asp:DataGrid id="dgSuppliers" runat="server" />
</body>
</html>
<script language="VB" runat="server">
Sub Page_Load(Source As Object, E As EventArgs)
Dim strConnection As String = "Provider=Microsoft.Jet.OleDb.4.0;" & _
"data source=C:\northwind.mdb;"
Dim objConnection As New OleDbConnection(strConnection)
Dim strSQL As String = "SELECT SupplierID, CompanyName " & _
"FROM Suppliers;"
Dim objCommand As New OleDbCommand(strSQL, objConnection)
objConnection.Open()
dgSuppliers.DataSource = objCommand.ExecuteReader()
dgSuppliers.DataBind()
objConnection.Close()
End Sub
</script>
Properties of OleDbConnection
<%@ Page Language="C#" %>
<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Data.SqlClient" %>
<%@ import Namespace="System.Data.OleDb" %>
<%@ import Namespace="System.Data.Odbc" %>
<script runat="server">
void Page_Load(object sender, EventArgs e) {
OleDbConnection myOleDbConnection = new OleDbConnection("PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA SOURCE="+ Server.MapPath("EmployeeDatabase.mdb;"));
myOleDbConnection.Open();
lblOleDbConnectionString.Text = myOleDbConnection.ConnectionString;
lblOleDbConnectionTimeout.Text = Convert.ToString(myOleDbConnection.ConnectionTimeout);
lblOleDbDatabase.Text = myOleDbConnection.Database;
lblOleDbDataSource.Text = myOleDbConnection.DataSource;
lblOleDbProvider.Text = myOleDbConnection.Provider;
lblOleDbServerVersion.Text = myOleDbConnection.ServerVersion;
lblOleDbState.Text = Convert.ToString(myOleDbConnection.State);
myOleDbConnection.Close();
}
</script>
<html>
<head>
</head>
<body>
<form runat="server">
<table>
<tbody>
<tr>
<td>
ConnectionString:
</td>
<td>
<asp:Label id="lblOleDbConnectionString" runat="server">ConnectionString</asp:Label></td>
</tr>
<tr>
<td>
ConnectionTimeout:
</td>
<td>
<asp:Label id="lblOleDbConnectionTimeout" runat="server">ConnectionTimeout</asp:Label></td>
</tr>
<tr>
<td>
Database:
</td>
<td>
<asp:Label id="lblOleDbDatabase" runat="server">Database</asp:Label></td>
</tr>
<tr>
<td>
DataSource:
</td>
<td>
<asp:Label id="lblOleDbDataSource" runat="server">DataSource</asp:Label></td>
</tr>
<tr>
<td>
Provider:
</td>
<td>
<asp:Label id="lblOleDbProvider" runat="server">Provider</asp:Label></td>
</tr>
<tr>
<td>
ServerVersion:
</td>
<td>
<asp:Label id="lblOleDbServerVersion" runat="server">ServerVersion</asp:Label></td>
</tr>
<tr>
<td>
State:
</td>
<td>
<asp:Label id="lblOleDbState" runat="server">State</asp:Label></td>
</tr>
</tbody>
</table>
</form>
</body>
</html>