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.net子字符串不工作
原标题:.net substring not working

在.NET中使用子字符串函数时,我遇到了ArgumentOutOfRange错误。我是.NET的新手,所以可能做错了什么。我有一个txtField,它是GUI中的一个文本字段组件。我正在使用Microsoft Visual Basic 2010学习版

txtField.Substring(txtField.Length-4,txtField.Length-1)

如果txt.Field只包含数字值,它可以正常工作,但只要文本字段包含字符,它就会中断。

有人有什么想法吗?

最佳回答

.NET将子字符串的长度作为第二个参数,而不是末尾(独占)。因此,如果您想要三个字符,请执行以下操作:

txtField.Substring(txtField.Length-4, 3)
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