试试这个：

  string  [] parts = yourStr.Split（' ：'）; 
 string  a = parts [ 1 ]。Trim（）; 
 string  b = parts [ 3 ]。修剪（）; 

如果你有字符串的长度并通过子字符串开始索引，你可以很容易地得到它：

  string  myStr =  这是测试; 
 //   string.Substring（int startInde，int length）;  
 string  myPart = myStr .Substring（ 2 ， 7 ）;  //  结果为：s is te 

如果你有一个specefic字符：

  string  myStr =   this * is * test; 
 string  [] myPart = myStr.Split（'  *'跨度>）; 
 //  结果是： 
 //   myPart [0] =this;  
 //   myPart [1] =是;  
 //   myPart [2] =test;  

您可以尝试的最简单的方法如下

  string  text = System.IO.File.ReadAllText（ @  C：\ Users \ UserName \ Document'\\ work \ test.txt）; 
 string  [] arr = text.Split（' ：跨度>）; 
列表< mymodel> modellist =  new  List< mymodel>（）; 

字典<字符串，>  d_list = 新字典<字符串，> （）; 
 for （ int  i =  0 ; i <  arr.Length; i = i +  2 ）
 {
 MyModel mm =  new  MyModel（）; 
 mm.FirstNum = arr [i]; 
 mm.SecondNum = arr [i +  1 ]; 
 modellist.Add（mm）; 
} 

< /   mymodel  >  < /   mymodel  >  

现在您可以轻松迭代

 modellist 

Hi all

Below is my string in a notepad

PUCID: 0000000000000002:LastPBLine: 7

Now i want to extract the number's and assign to variables.

e.g. a=0000000000000002
and b=7

Please tell me how to do this

Try this:

string[] parts = yourStr.Split(':');
string a = parts[1].Trim();
string b = parts[3].Trim();

you can get it easily if you have lenth of string and start index by substring:

string myStr ="this is test";
//string.Substring(int startInde,int length);
string myPart = myStr .Substring(2,7);//the result is:"s is te"

and if you have a specefic character:

string myStr ="this*is*test";
string[] myPart = myStr.Split('*');
//the result is:
//myPart[0] = "this";
//myPart[1] = "is";
//myPart[2] = "test";

The simplest way which you can try is as follows

string text = System.IO.File.ReadAllText(@"C:\Users\UserName\Documents\Work\test.txt");
            string[] arr=text.Split(':');
            List<mymodel> modellist = new List<mymodel>();

            Dictionary<string,> d_list = new Dictionary<string,>();
            for (int i = 0; i < arr.Length; i = i + 2)
            {
                MyModel mm = new MyModel();
                mm.FirstNum = arr[i];
                mm.SecondNum = arr[i + 1];
                modellist.Add(mm);
            }

</mymodel></mymodel>

now you can easily iterate over

modellist