Question

Q_OBJECT

上面是我的代码，用于在txtmonthlyallocation文本框中显示“IBSP Weekly Allocation”列的值。这段代码有什么问题，为什么它不起作用？感谢。

Answer 1

选项使用DataReader查找内容并显示与找到的行相关联的字段

Dim searchValue As String = "BE-2349"

Using cn As New SqlClient.SqlConnection With {.ConnectionString = My.Settings.ConnectionString}
    Using cmd As New SqlClient.SqlCommand With
        {
            .Connection = cn,
            .CommandText = "SELECT ProductID, Name, ProductNumber FROM Production.Product WHERE ProductNumber = @ProductNumber"}
        cmd.Parameters.AddWithValue("@ProductNumber", searchValue)

        cn.Open()
        Dim reader As SqlClient.SqlDataReader = cmd.ExecuteReader
        reader.Read()
        If reader.HasRows Then
            TextBox1.Text = reader.GetSqlString(1)
        End If

    End Using
End Using

使用命令文本的xml文字

Dim searchValue As String = "BE-2349"

Using cn As New SqlClient.SqlConnection With {.ConnectionString = My.Settings.ConnectionString}
    Using cmd As New SqlClient.SqlCommand With
        {
            .Connection = cn,
            .CommandText =
            <SQL>
                SELECT 
                    ProductID, 
                    Name, 
                    ProductNumber 
                FROM Production.Product 
                WHERE ProductNumber = @ProductNumber
            </SQL>.Value}
        cmd.Parameters.AddWithValue("@ProductNumber", searchValue)

        cn.Open()

        Dim reader As SqlClient.SqlDataReader = cmd.ExecuteReader
        reader.Read()

        If reader.HasRows Then
            TextBox1.Text = reader.GetSqlString(1)
        End If

    End Using
End Using

在vb.net 2010中的文本框中显示来自sql server 2008的记录不起作用

1 个答案: