Question

我有一张价格表，并且所有价格都是“客户”支付的

| ID | Price |
|----|-------|
|  1 |  5.00 |
| 50 |  6.70 |

当你在文本框中输入3或3.00时，我想制作一些东西，然后它会显示超过该值的所有记录，因此ID 1支付5 quid然后它们将显示并与{{1我希望它们显示在我的datagridview中。

到目前为止我所拥有的是：

ID

Answer 1

我已按如下方式更改您的代码：

myDA = New OleDbDataAdapter
myDataSet = New DataSet

Dim price As Double = Convert.ToDouble(TextBox1.Text)
'Save the value entered in textbox on the variable price

Try
    cmd = New OleDbCommand()
    cmd.CommandText = "Select ID,Price from tableName where Price > @Price "
    'tableName should be replaced with the name of your table
    cmd.Parameters.AddWithValue("@Price", price)
    'Add parameter to pass the price to the query
    cmd.Connection = con
    If con.State = ConnectionState.Closed Then con.Open()
    myDA.SelectCommand = cmd
    myDA.Fill(myDataSet, "tableName")
    DataGridView1.DataSource = myDataSet.Tables("tableName").DefaultView
    con.Close()
Catch ex As Exception
    MessageBox.Show(ex.Message)
End Try

如何显示超过给定值的数据？

1 个答案: