主题：[求助]代码问题文本框为空

 你想实现什么？

If Forms("入库窗口").Controls("TextBox1").Text > ""  Then

    '要执行的代码

End If

 return就是返回啊，你遇到什么问题？

 完全不懂你的意思，你想什么时候，执行这段代码啊

 代码写到keydown事件

 

If e.KeyCode = Keys.Enter Then
   
    Dim Filter As String
   
    With e.Form.Controls("TextBox1")
               
        If .text IsNot Nothing Then
           
            Filter &= "助记码= '" & .text & "'"
           
            Filter &= " or 条形码= '" & .text & "'"
           
            Filter &= " or 商品名= '" & .text & "'"
           
            Filter &= " or 自编码= '" & .text & "'"
           
            Filter &= " or 商品号= '" & .text & "'"
           
           
           
        End If
       
    End With
   
    If Filter > "" Then
       
        Tables("商品资料表").Filter = Filter
       
    Else
       
        Tables("商品资料表").Filter = ""
       
    End If
   
    e.cancel = True
    Dim r As Row = Tables("商品资料表").Current

If r Is Nothing Then
   
    msgbox("没有该商品")
   
Else
   
    If Forms("入库窗口").Controls("TextBox1").Text ="" Then
        Return
'返回
    Else
       
        Dim ndr As DataRow = DataTables("商品入库表").AddNew
       
        ndr("商品号") = r("商品号")
       
        ndr("商品名") = r("商品名")
       
        ndr("条形码") = r("助记码")
       
        ndr("助记码") = r("助记码")
       
        ndr("自编码") = r("自编码")
       
        ndr("规格") = r("规格")
       
        ndr("单位") = r("单位")
       
        ndr("生产单位") = r("生产单位")
       
        ndr("单位") = r("单位")
       
        ndr("批文") = r("批文")
       
        ndr("入库号") = e.Form.Controls("TextBox2").text
       
        ndr("数量") = e.Form.Controls("TextBox3").text
       
        ndr("单价") = e.Form.Controls("TextBox4").text
       
        ndr("入库金额") = e.Form.Controls("TextBox5").text
       
        ndr("入库日期") = e.Form.Controls("DateTimePicker1").Value
    End If
End If
End If