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我有代码将下拉列表中的值附加到文本框。但我不确定为什么这不会在文本框中显示任何类型的文本。
Try
' Add the selected text to the end of the text already in txtExpression textbox
txtExpression.AppendText(cboOpenParen.SelectedText)
Catch ex As Exception
Finally
End Try
Try
' Add the selected text to the end of the text already in txtExpression textbox
txtExpression.AppendText(cboOpenParen.Text)
Catch ex As Exception
Finally
End Try