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清空所有窗口的话，直接就是把所有的东西都划掉就可以了，很简单的。
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在前台删除处写js代码
if(confim("确定删除？"))
{ //确定删除的页面？isdel=yes }
然后在后台page_load获取isdel的值，若为yes，则进行删除操作即可！
VS+access数据库的，MSSQL数据库的话你改下，反正就2种链接方式，书上都有。
下面是代码和解释，另外我会把文件发到你邮箱里的，你把文件复制到自己的站点文件夹里面运行就可以看到效果了。
Imports System.Data.OleDb
Imports System.Data
Partial Class baidu
Inherits System.Web.UI.Page
'下面是添加记录
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
'定义“连接数据库”和“执行SQL”变量
Dim myConnection As OleDbConnection
Dim myCommand As OleDbCommand
Dim dbname As String
dbname = Server.MapPath("baidu.mdb")
myConnection = New OleDbConnection("PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA Source=" dbname)
myConnection.Open()
'INSERT INTO "表格名" ("栏位1", "栏位2", ...) VALUES ("值1", "值2", ...)
'这里可以加上 昵称 是否已经存在的判断语句，就是 SELECT "栏位名" FROM "表格名" WHERE "条件"
myCommand = New OleDbCommand("Insert INTO a1(昵称) Values('" TextBox1.Text "')", myConnection)
myCommand.ExecuteNonQuery()
Response.AddHeader("Refresh", "0")
'关闭连接()
myConnection.Close()
'释放资源
myCommand.Dispose()
End Sub
'下面是删除记录
Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
'定义“连接数据库”和“执行SQL”变量
Dim myConnection As OleDbConnection
Dim myCommand As OleDbCommand
Dim dbname As String
dbname = Server.MapPath("baidu.mdb")
myConnection = New OleDbConnection("PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA Source=" dbname)
myConnection.Open()
'DELETE FROM "表格名" WHERE {条件}
myCommand = New OleDbCommand("DELETE FROM a1 WHERE 昵称 = '" TextBox1.Text "'", myConnection)
myCommand.ExecuteNonQuery()
Response.AddHeader("Refresh", "0")
'关闭连接()
myConnection.Close()
'释放资源
myCommand.Dispose()
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
'定义“连接数据库”和“执行SQL”变量
Dim myConnection As OleDbConnection
Dim myCommand As OleDbCommand
Dim dbname As String
dbname = Server.MapPath("baidu.mdb")
myConnection = New OleDbConnection("PROVIDER=Microsoft.Jet.OLEDB.4.0;DATA Source=" dbname)
myConnection.Open()
myCommand = New OleDbCommand("select * FROM a1", myConnection)
GridView1.DataSource = myCommand.ExecuteReader()
GridView1.DataBind()
'关闭连接()
myConnection.Close()
'释放资源
myCommand.Dispose()
End Sub
End Class
邮件已经发生，请查收。记得给分哈
方法有多种。
可以dataAdapter.Fill到数据表应该，设置几个command，再通过dataAdapter.Update就可以更新数据了。不过表要有一个关键的key吧。
另外一种直观一点：
也需要表有个关键key有就是关键字段。
你datagridview.reomveAt(index)同时执行sqlcommand("delete * From table where keyFild='" key "'")就可以。
参考一个实例，如下：
Private Sub bitDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bitDelete.Click
Dim oraConn As New OracleConnection()
oraConn.ConnectionString = " data source=数据库名字;user id=账号;password=密码"
oraConn.Open()
Dim id As String = DataGridView1.CurrentRow.Cells(0).Value.ToString().Trim()
Dim queryString = "delete from t where id ='" id号 "'"
Dim adapter As OracleDataAdapter = New OracleDataAdapter(queryString,oraConn)
Dim mark As DataSet = New DataSet
adapter.Fill(mark, "Mark")
MessageBox.Show("删除数据成功!")
Dim adapter As OracleDataAdapter = New OracleDataAdapter("select * from t ORDER BY id", oraConn)
Dim score As DataSet = New DataSet()
adapter.Fill(score , "Score ")
DataGridView1.DataSource = score
DataGridView1.DataMember = score .Tables(0).ToString
oraConn.Close()
End Sub