一个小问题

[kinglily]

我怎样判断一个字符串里是否有一些字符？？
如“abcfefhhddga”有“fe”？？若有就返回真值

[xjzhang]

函数： inStr
示例：
本例使用 InStr 函数返回一个字符串在另一个字符串中的第一个匹配项的位置。

Dim SearchString, SearchChar As String
Dim MyPos As Integer

SearchString ="XXpXXpXXPXXP" ' String to search in.
SearchChar = "P" ' Search for "P".

' A textual comparison starting at position 4. Returns 6.
MyPos = InStr(4, SearchString, SearchChar, CompareMethod.Text)

' A binary comparison starting at position 1. Returns 9.
MyPos = InStr(1, SearchString, SearchChar, CompareMethod.Binary)

' Comparison is binary by default (last argument is omitted).
MyPos = InStr(SearchString, SearchChar) ' Returns 9.

MyPos = InStr(1, SearchString, "W") ' Returns 0.

[sualtring]

循环　遍历阿

[isage2002]

Dim s as string=“abcfefhhddga”
if (s.indexof("fe")<>-1) then
'包含
End If
我也是刚刚学会这样的，.net独特的用法，很经典

[platelet]

string s1=this.textBox1.Text;
string s2=this.textBox2.Text;
int count1=s1.Length;
int count2=s2.Length;
if(count1<count2)
MessageBox.Show("aaaa");
int count=count1-count2+1;
int exist=-1;

for(int i=0;i<count;i++)
{
exist=String.Compare(s1.Substring(i,count2),s2);
if(exist==0)
MessageBox.Show("Haa!");
}