我的VISUAL STUDIO的代码哪里错了?
来源:百度知道 编辑:UC知道 时间:2024/06/07 15:23:44
我想把数据库的信息显示在TEXT文本框中,看下这段代码出什么问题了.点显示后结果在文本框中显示的是"FALSE",帮我看下谢谢了~
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
cmd.CommandText = "select * from guoan"
cmd.Connection = conn
conn.Open()
Dim returnValue As Data.OleDb.OleDbDataReader
returnValue = cmd.ExecuteReader
While returnValue.Read
End While
txtguoan.Text = returnValue.Read
conn.Close()
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
cmd.CommandText = "select * from guoan"
cmd.Connection = conn
conn.Open()
Dim returnValue As Data.OleDb.OleDbDataReader
returnValue = cmd.ExecuteReader
While returnValue.Read
End While
txtguoan.Text = returnValue.Read
conn.Close()
End Sub
vb语法不太懂不过你把txtguoan.Text = returnValue.Read 放在EndWhile前试试看
conn.Open()
dim ds as new dataset
Dim TempdaDataAdapter As New SqlClient.SqlDataAdapter
Dim TempcmdCommand As New SqlClient.SqlCommand(sql, SqlConnect)
TempdaDataAdapter.Fill(ds, tblName)
me.textbox1.text= ds.tables(0).rows(0).item(0).tostring
你的cmd.CommandText = "select * from guoan"这个语句 返回的结果是一行(多列,单列)? 是否正确或是合适啊!
还有你的while循环是否正确啊??
因为前面的代码不知道啊!所以剩下的你自己看了啊!
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