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一个使用GridView显示数据,并且可以进行添加、修改、删除操作的例子

2006-08-24 08:33 1391 查看
<%@ Page Language="VB" Debug ="true" %>
<%@ Import Namespace="System.Data.OleDb" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
Dim connstr As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("rizhi.mdb") & ";User

Id=;Password=;"
Dim sql As String
Dim mycommand As OleDbCommand
Dim myread As OleDbDataReader
Dim conn As OleDbConnection
Sub page_load(ByVal sender As Object, ByVal e As EventArgs)
conn = New OleDbConnection(connstr)
conn.Open()
sql = "select * from rizhi"
mycommand = New OleDbCommand(sql, conn)
myread = mycommand.ExecuteReader()

GridView1.DataSource = myread
GridView1.DataBind()
conn.Close()
End Sub

Protected Sub GridView1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)

End Sub
Protected Sub GridView1_RowDeleting(ByVal sender As Object, ByVal e As GridViewDeleteEventArgs)
Dim id As Integer = GridView1.DataKeys(e.RowIndex).Value
Dim j As Integer = 0
conn = New OleDbConnection(connstr)
conn.Open()
sql = "delete from rizhi where id=" & id

mycommand = New OleDbCommand(sql, conn)
Try
j = mycommand.ExecuteNonQuery
Response.Write("共删除了" & j & "条记录!")
sql = "select * from rizhi"
mycommand = New OleDbCommand(sql, conn)
myread = mycommand.ExecuteReader()

GridView1.DataSource = myread
GridView1.DataBind()

Catch ex As Exception
Throw ex
Finally
conn.Close()
End Try

End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<center>
<a href ="rizhi_add.aspx" style ="font-size :12px;">增加新日志</a>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" Width ="60%" Font-Size="12px"

OnSelectedIndexChanged="GridView1_SelectedIndexChanged" OnRowDeleting="GridView1_RowDeleting" DataKeyNames="id" >
<Columns>
<asp:BoundField DataField="id" HeaderText="序号" >
<ItemStyle Font-Size="12px" HorizontalAlign="Left" />
<HeaderStyle BackColor="BurlyWood" Font-Size="12px" HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="rq" HeaderText="日期" >
<ItemStyle Font-Size="12px" HorizontalAlign="Left" />
<HeaderStyle BackColor="BurlyWood" Font-Size="12px" HorizontalAlign="Center" />
</asp:BoundField>

<asp:BoundField DataField="n_je" HeaderText="金额" >
<ItemStyle Font-Size="12px" HorizontalAlign="Right" />
<HeaderStyle BackColor="BurlyWood" Font-Size="12px" HorizontalAlign="Center" />
</asp:BoundField>

<asp:BoundField DataField="title" HeaderText="标题" >
<ItemStyle Font-Size="12px" HorizontalAlign="Left" />
<HeaderStyle BackColor="BurlyWood" Font-Size="12px" HorizontalAlign="Center" />
</asp:BoundField>

<asp:BoundField DataField="content" HeaderText="内容" >
<ItemStyle Font-Size="12px" HorizontalAlign="Left" />
<HeaderStyle BackColor="BurlyWood" Font-Size="12px" HorizontalAlign="Center" />
</asp:BoundField>

<asp:HyperLinkField DataTextField="id" DataNavigateUrlFields ="id"

DataNavigateUrlFormatString="rizhi_edit.aspx?id={0}" HeaderText ="操作" DataTextFormatString ="修改" >
<ItemStyle Font-Size="12px" HorizontalAlign="Center" />
<HeaderStyle BackColor ="burlyWood" Font-Size="12px" HorizontalAlign="center" />
</asp:HyperLinkField>
<asp:CommandField DeleteText ="删除" HeaderText="操作" ButtonType="Link" ShowDeleteButton="true" />
</Columns>
</asp:GridView>
</center>
</div>
</form>
</body>
</html>

显示rizhi表的所有记录,并且可以对这些记录进行修改和删除,并且可以添加新日志
添加新日志时跳转到rizhi_add.aspx页面进行添加;
修改是跳转到rizhi_edit.aspx页面进行,传递一个参数id;
删除操作,直接在本页面进行,在
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" Width ="60%" Font-Size="12px"

OnSelectedIndexChanged="GridView1_SelectedIndexChanged" OnRowDeleting="GridView1_RowDeleting" DataKeyNames="id" >
中可以看到,删除操作响应的是GridView1_RowDeleting事件,在GridView1_RowDeleting中可以看到,删除了要删除的记录之后,需要对GridView1

进行重新绑定,显示删除记录之后数据库表rizhi里面的全部记录.

该页面进行的删除,是直接删除该记录,而没有进行提示"是否确认删除该记录",有关让用户确认之后再删除记录的方法,会在以后的文章中提到.
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