C# 如何获取文本框文本的前 3 个字符？
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How to get first 3 characters of a textbox's text?
提问by user2442470
How do I get the first 3 characters of the text in a textbox?
如何获取文本框中文本的前 3 个字符？
For example, textBox1.Text = "HITHEREGUYS"
例如， textBox1.Text = "HITHEREGUYS"
When I get the first 3 characters, it should show HIT.
当我得到前 3 个字符时，它应该显示HIT.
采纳答案by TGH
string result = textBox1.Text.Substring(0,3);
Use Substring
使用子串
回答by logixologist
Here is basically the way you would get it:
这里基本上是你得到它的方式：
LEFT(textbox1.text, 3)
回答by Kuba Szostak
Text lower than 3 characters will throw an exception. So check text length first:
少于 3 个字符的文本将引发异常。所以首先检查文本长度：
string result = textBox1.Text.Length <= 3 ? textBox1.Text : textBox1.Text.Substring(0, 3);
