用ado+来删除数据_Asp.NET数据库操作
日期：2009-09-21 浏览次数：20379 次
<%@ Import Namespace="System.Data.SQL" %>
<HTML>
<script language="VB" runat="server">
Dim MyConnection As SQLConnection
Sub Page_Load(Src As Object, E As EventArgs)
MyConnection = New SQLConnection("server=YOUR-SERVER;uid=joeuser;pwd=joeuser;database=pubs")
If Not (IsPostBack)
BindGrid()
End If
End Sub
Sub MyDataGrid_Delete(Sender As Object, E As DataGridCommandEventArgs)
Dim MyCommand As SQLCommand
Dim DeleteCmd As String = "DELETE from Authors where au_id = @Id"
MyCommand = New SQLCommand(DeleteCmd, MyConnection)
MyCommand.Parameters.Add(New SQLParameter("@Id", SQLDataType.VarChar, 11))
MyCommand.Parameters("@Id").Value = MyDataGrid.DataKeys(CInt(E.Item.ItemIndex))
MyCommand.ActiveConnection.Open()
Try
MyCommand.ExecuteNonQuery()
Message.InnerHTML = "<b>Record Deleted</b><br>" & DeleteCmd
Catch Exp As SQLException
Message.InnerHTML = "ERROR: Could not delete record"
Message.Style("color") = "red"
End Try
MyCommand.ActiveConnection.Close()
BindGrid()
End Sub
Sub BindGrid()
Dim DS As DataSet
Dim MyCommand As SQLDataSetCommand
MyCommand = New SQLDataSetCommand("select * from Authors", MyConnection)
DS = new DataSet()
MyCommand.FillDataSet(DS, "Authors")
MyDataGrid.DataSource=DS.Tables("Authors").DefaultView
MyDataGrid.DataBind()
End Sub
</script>
<body style="font: 10pt verdana">
<form runat="server">
<h3><font face="Verdana">Deleting a Row of Data</font></h3>
<span id="Message" MaintainState="false" style="font: arial 11pt;" runat="server"/><p>
<ASP:DataGrid id="MyDataGrid" runat="server"
Width="800"
BackColor="#ccccff"
BorderColor="black"
ShowFooter="false"
CellPadding=3
CellSpacing="0"
Font-Name="Verdana"
Font-Size="8pt"
HeaderStyle-BackColor="#aaaadd"
DataKeyField="au_id"
OnDeleteCommand="MyDataGrid_Delete"
>
<property name="Columns">
<ASP:ButtonColumn Text="Delete Author" CommandName="Delete"/>
</property>
</ASP:DataGrid>
</form>
</body>
</HTML>
