VB涓殑瀛楃涓插嚱鏁板彲浠ラ€氳繃瀛楃涓插璞℃垨鑰呭瓧绗︿覆鍙橀噺杩涜璋冪敤銆備互涓嬫槸甯哥敤鐨勫瓧绗︿覆鍑芥暟鍙婂叾浣跨敤鏂规硶锛?br/>1. Len锛氳繑鍥炲瓧绗︿覆鐨勯暱搴︺€?br/>绀轰緥锛?br/>```
Dim str As String = "Hello World"
Dim length As Integer = Len(str)
Console.WriteLine("瀛楃涓茬殑闀垮害涓猴細" & length)
```
2. Trim锛氬幓闄ゅ瓧绗︿覆涓殑棣栧熬绌烘牸銆?br/>绀轰緥锛?br/>```
Dim str As String = "   Hello World   "
Dim trimmedStr As String = Trim(str)
Console.WriteLine("鍘婚櫎绌烘牸鍚庣殑瀛楃涓蹭负锛? & trimmedStr)
```
3. UCase锛氬皢瀛楃涓茶浆鎹负澶у啓銆?br/>绀轰緥锛?br/>```
Dim str As String = "hello world"
Dim upperCaseStr As String = UCase(str)
Console.WriteLine("杞崲涓哄ぇ鍐欏悗鐨勫瓧绗︿覆涓猴細" & upperCaseStr)
```
4. LCase锛氬皢瀛楃涓茶浆鎹负灏忓啓銆?br/>绀轰緥锛?br/>```
Dim str As String = "HELLO WORLD"
Dim lowerCaseStr As String = LCase(str)
Console.WriteLine("杞崲涓哄皬鍐欏悗鐨勫瓧绗︿覆涓猴細" & lowerCaseStr)
```
5. Mid锛氳繑鍥炰粠鎸囧畾浣嶇疆寮€濮嬬殑鎸囧畾闀垮害鐨勫瓙瀛楃涓层€?br/>绀轰緥锛?br/>```
Dim str As String = "Hello World"
Dim subStr As String = Mid(str, 7, 5)
Console.WriteLine("瀛愬瓧绗︿覆涓猴細" & subStr)
```
6. Replace锛氬皢瀛楃涓蹭腑鐨勬寚瀹氬瓧绗︽垨瀛楃涓叉浛鎹负鏂扮殑瀛楃鎴栧瓧绗︿覆銆?br/>绀轰緥锛?br/>```
Dim str As String = "Hello World"
Dim replacedStr As String = Replace(str, "World", "VB")
Console.WriteLine("鏇挎崲鍚庣殑瀛楃涓蹭负锛? & replacedStr)
```
杩欎簺鏄疺B涓父鐢ㄧ殑瀛楃涓插嚱鏁扮殑浣跨敤鏂规硶锛屾牴鎹叿浣撻渶姹傞€夋嫨鍚堥€傜殑鍑芥暟鏉ュ鐞嗗瓧绗︿覆銆?/p>