字符串中的字符无法替换掉！！急！

Question

我从一个文本文件中读取数据，得到一个string ，然后想将某些字符串替换掉，但是不能成功，请指教：
文本文件：
Microsoft Visual Studio Solution File, Format Version 9.00
# Visual Studio 2005
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = iappProjName, iappProjNamePath, iappProjGuid
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{25A0E2BB-2AF8-4057-A875-C588DC1C2729}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{25A0E2BB-2AF8-4057-A875-C588DC1C2729}.Debug|Any CPU.Build.0 = Debug|Any CPU
{25A0E2BB-2AF8-4057-A875-C588DC1C2729}.Release|Any CPU.ActiveCfg = Release|Any CPU
{25A0E2BB-2AF8-4057-A875-C588DC1C2729}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
EndGlobalSection
EndGlobal读取的程序如下：            string slnMoban = @"..\..\..\ucodeWinForm\slnMoban.txt";
            StreamReader sr = new StreamReader(slnMoban, System.Text.Encoding.UTF8);
            string readSlnFile = sr.ReadToEnd();
            sr.Close();            readSlnFile.Replace("iappProjName", "rrrrrrrrrrr");
            Console.WriteLine(readSlnFile);
           
            Console.ReadLine();最后看输出，iappProjName无法被替换。请达人帮忙。

Answer 1

readSlnFile = readSlnFile.Replace("iappProjName", "rrrrrrrrrrr");
Console.WriteLine(readSlnFile);

Answer 2

string s=readSlnFile.Replace("iappProjName", "rrrrrrrrrrr");
返回的对象才是你要的.
因为STRING是不可变的.

Answer 3

readSlnFile = readSlnFile.Replace("iappProjName", "rrrrrrrrrrr");//需重新赋值

Answer 4

晕readSlnFile.Replace("iappProjName", "rrrrrrrrrrr");
//改为
readSlnFile = readSlnFile.Replace("iappProjName", "rrrrrrrrrrr");

Answer 5

设断点跟踪readSlnFile看，是否把文本读进来了

Answer 6

所有的字符串处理都是要取返回新的string.
内部有string常量池来维护的.不建义大量处理string.

Answer 7

            string slnMoban = @"..\..\..\ucodeWinForm\slnMoban.txt";
            StreamReader sr = new StreamReader(slnMoban, System.Text.Encoding.UTF8);
            string readSlnFile = sr.ReadToEnd().Replace("iappProjName", "rrrrrrrrrrr");
            sr.Close();            Console.WriteLine(readSlnFile);
           
            Console.ReadLine();

Answer 8

readSlnFile.Replace("iappProjName", "rrrrrrrrrrr");
//改为
readSlnFile = readSlnFile.Replace("iappProjName", "rrrrrrrrrrr");