update.aspx
来自「asp做的新闻系统」· ASPX 代码 · 共 123 行
ASPX
123 行
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SQL" %>
<html>
<script language="VB" runat="server">
'建立数据连接和命令对象
Dim UConn As SQLConnection
'在页面装入时用此方法
Sub Page_Load(Sender As Object, E As EventArgs)
'建立与数据库的连接
UConn = New SQLConnection("server=localhost;uid=NetBBS;pwd=;database=NETBBS")
If Not (IsPostBack)
BindGrid()
End If
End Sub
'在点击Edit连接时用到此方法:
Sub UDG_Edit(Sender As Object, E As DataGridCommandEventArgs)
UDG.EditItemIndex = CInt(E.Item.ItemIndex)
BindGrid()
End Sub
'在点击Cancle连接时用到此方法:
Sub UDG_Cancel(Sender As Object, E As DataGridCommandEventArgs)
UDG.EditItemIndex = -1
BindGrid()
End Sub
'在点击UpDate连接时用到此方法:
Sub UDG_Update(Sender As Object, E As DataGridCommandEventArgs)
'创建数据集
Dim DS As DataSet
'创建命令对象
Dim UComm As SQLCommand
'定义修改数据的sql语句
Dim UpdateCmd As String = "UPDATE FORUM SET
[ID]=@fid,[Name]=@fname,Notes=@Notes,FatherID=@FatherID,status=@status where [ID]=@fid"
'设置命令对象类型
UComm = New SQLCommand(UpdateCmd, UConn)
'获得更改的数据
UComm.Parameters.Add(New SQLParameter("@fid", SQLDataType.VarChar, 4))
UComm.Parameters.Add(New SQLParameter("@fname", SQLDataType.VarChar, 50))
UComm.Parameters.Add(New SQLParameter("@Notes", SQLDataType.VarChar, 500))
UComm.Parameters.Add(New SQLParameter("@FatherID", SQLDataType.VarChar, 4))
UComm.Parameters.Add(New SQLParameter("@status", SQLDataType.VarChar, 1))
Dim Cols As String() = {"@fid","@fname","@Notes","@FatherID","@status"}
'激活数据连接
UComm.ActiveConnection.Open()
Try
'执行命令集
UComm.ExecuteNonQuery()
Message.InnerHtml = "修改成功!!"
'改为Edit连接
UDG.EditItemIndex = -1
'处理异常
Catch Exp As SQLException
If Exp.Number = 2627
Message.InnerHtml = "相同的记录在数据库中"
Else
Message.InnerHtml = "不能更改记录!!"
End If
Message.Style("color") = "red"
End Try
'关闭数据连接
UComm.ActiveConnection.Close()
'调用BindGrid()方法
BindGrid()
End Sub
'定义BindGrid()方法
Sub BindGrid()
Dim DS As DataSet
Dim UComm As SQLDataSetCommand
'从表forum选出数据
UComm = new SQLDataSetCommand("select * from forum", UConn)
'填充数据集
DS = new DataSet()
UComm.FillDataSet(DS, "forum")
'数据的绑定
UDG.DataSource=DS.Tables("forum").DefaultView
UDG.DataBind()
End Sub
</script>
<title>
Update!
</title>
<body style="font: 10pt verdana">
<BR>
<CENTER>
<form runat="server">
<h3><font face="Verdana">.NET->修改记录</font></h3>
<span id="Message" MaintainState="false" style="font: arial 11pt;" runat="server"/><p>
<!--响应对数据库操作的模板-->
<ASP:DataGrid id="UDG" runat="server"
Width="800"
BackColor="#ffffff"
BorderColor="black"
ShowFooter="false"
CellPadding=3
CellSpacing="0"
Font-Name="Verdana"
Font-Size="8pt"
HeaderStyle-BackColor="#ffffff"
OnEditCommand="UDG_Edit"
OnCancelCommand="UDG_Cancel"
OnUpdateCommand="UDG_Update"
>
<property name="Columns">
<asp:EditCommandColumn EditText="编辑" CancelText="取消" UpdateText="修改" ItemStyle-Wrap="false"/>
</property>
</ASP:DataGrid>
</form>
</CENTER>
</body>
</html>
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