Edit/Update datagridview VB 表单

Question

当我尝试编辑和更新 datagriview 中的数据时，它出现了一条错误消息，指出运算符 '&' 没有为类型 'TextBox' 和字符串 "".

定义

请帮忙。谢谢

这是我的代码

 Private Sub btnaddrecord_Click(sender As Object, e As EventArgs) Handles btnaddrecord.Click

    Dim cmd As New OleDb.OleDbCommand
    If Not cnn.State = ConnectionState.Open Then

        cnn.Open()
    End If

    cmd.Connection = cnn

    If Me.IdentificationNotest.Tag & "" = "" Then

        cmd.CommandText = "INSERT INTO vehicledefects(Codenumber, vehiclereg, datereported, defects1, repaired1, defects2, repaired2, defects3, repaired3, datefixed) " & _
        " VALUES(" & Me.IdentificationNotest.Text & ",'" & Me.vehiclereg.Text & "','" & Me.datereported.Text & "','" & Me.defects1.Text & "','" & Me.repaired1.Text & "','" & _
        Me.defects2.Text & "','" & Me.repaired2.Text & "','" & _
        Me.defects3.Text & "','" & Me.repaired3.Text & "','" & _
        Me.datefixed.Text & "')"
        cmd.ExecuteNonQuery()
    Else

        cmd.CommandText = "UPDATE vehicledefects" & _
         " SET Codenumber =" & Me.IdentificationNotest.Text & _
          ", vehiclereg ='" & Me.vehiclereg.Text & "'" & _
            ", datereported ='" & Me.datereported.Text & "'" & _
            ", defects1 ='" & Me.defects1.Text & "'" & _
            ", repaired1 ='" & Me.repaired1.Text & "'" & _
            ", defects2 ='" & Me.defects2.Text & "'" & _
            ", repaired2='" & Me.repaired2.Text & "'" & _
            ", defects3='" & Me.defects3.Text & "'" & _
            ", repaired3='" & Me.repaired3.Text & "'" & _
            ", datefixed='" & Me.datefixed.Text & "'" & _
         " WHERE Codenumber =" & Me.IdentificationNotest.Tag
        cmd.ExecuteNonQuery()
    End If

    refreshdata()

    Me.btnclear.PerformClick()

    cnn.Close()
    datefixed.Text = ""
    IdentificationNotest.Text = ""

End Sub

Answer 1

以后，您还应该 post 引发错误的行号。

错误告诉您您正在做类似的事情：

dim myString as String = myTextBox & " some more text"

在这种情况下，您需要执行以下操作：

dim myString as String = myTextBox.Text & " some more text"

在您 post 编辑的代码中，我找不到它的实例 - 所以它可能在代码的其他地方。虽然，代码很难阅读，所以我可能错过了它。

您可能还知道此代码容易受到 SQL Injection attacks

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