怎么获得字符串中所有逗号的位置

[巩师磊]

怎么获得字符串中所有逗号的位置
如"125,4852,892,982,9272,581,2585,25898962,586122,98254,";

[wuyq11]

分割字符串.通过循环
把字符串和长度保存到数组或泛型.
string s;
int len=0;
string[] str=s.split(',');
for(int i=0;i<str.length;i++)
{
//长度值循环添加
}

[机器人]

 Dim str As String = "125,4852,892,982,9272,581,2585,25898962,586122,98254,"
        Dim lstIndex As List(Of Integer) = New List(Of Integer)
        For i As Integer = 0 To str.Length - 1
            If str(i) = ","c Then
                lstIndex.Add(i)
            End If
        Next

[perhaplove]

正则

[hongmaohouzi]

string str1 = "125,4852,892,982,9272,581,2585,25898962,586122,98254,";
int strlong = str1.Length;
for (int i = 0; i < Convert.ToInt32(str1.Length); i++)
{
string a = str1.Substring(i,1).ToString();
if (str1.Substring(i,1).ToString() == ",")
{
int j = 0;
j = i + 1;
this.TextBox1.Text = this.TextBox1.Text + j + ";";
}
else
{
this.TextBox1.Text = this.TextBox1.Text + "#";
}
}

你看看是否满足你的要求！

[zpcoder]

try

string str1 = "125,4852,892,982,9272,581,2585,25898962,586122,98254,"; 
string a;
int i=0;
while(str.Contains(","))   //不好意思，单词忘了,这里好像是个Contains(",")
{ 
    i=str1.IndexOf(",");
    a = str1.Substring(0,i); 
    this.TextBox1.Text += i.ToString() + ";"; 
} 

[真相重于对错]

String.IndexOf (
char value,
int startIndex
)

[liujiayu10]

IndexOf 只要用这个方法就可以了嘛，干嘛搞得那么复杂呢

[sxmonsy]

string str = "fkfjaf,dfasfasfas,asfasdf,,,,";
int number = 0;
foreach (char chr in str)
{
if (chr == ',')
{
number ++;
}
} 

[cacaca6]

我Call，各位老大，用Linq呀，超级简单，就一条语句

string str = "125,4852,892,982,9272,581,2585,25898962,586122,98254,";
foreach (var n in str.ToCharArray().Select((s, n) => new KeyValuePair<int, char>(n, s))
.Where(s => s.Value == ',')
.Select(s => s.Key)
)
{
Console.WriteLine(n);
}