错误的输入字符串格式不正确 [英] error input string not in correct format

问题描述

我只是想创建一个名称为当前日期的文件，并检查该文件是否存在.如果存在，则向该文件中写入一些文本，否则将某些数据附加到该文件中.

我写的代码是

Hi,

i am just trying to create a file with its name as current date and checking whether the file is existing or not.if existing i am writing some text to the file otherwise i am appending some data to the file.

the code i wrote is

StringBuilder  log=new StringBuilder ();
            
            string path= string.Format(@"C:/Documents and Settings/aj99823/Desktop/project/{yyyy-mm-dd}.txt",System.DateTime .Now .Date);
            
            if (!File.Exists(path))
            {
                log = new StringBuilder (path);
                File.WriteAllText(path, commaDelimitedText.ToString ()); 
            }
            else
            {
                File.AppendAllText(path, commaDelimitedText.ToString());
            }

它给我错误，说输入字符串的格式不正确...
谁能请我帮忙........... ??????

its giving me error saying input string is not in correct format...
can anyone pleae help me...........??????

推荐答案

看我能解决吗?我在本地尝试，但遇到相同的错误，新的修改如下:

look man i solve it; i try it locally and i get the same error and the new modifications are below:

StringBuilder log = new StringBuilder();

        //string path = string.Format(@"C:\Tester\Lottery_Windows\{yyyy-mm-dd}.txt", System.DateTime.Now.Date);
        string path = @"C:/Documents and Settings/aj99823/Desktop/project/" + DateTime.Now.ToString("yyyy-MM-dd");

        if (!File.Exists(path))
        {
            log = new StringBuilder(path);
            File.WriteAllText(path, "Hello World");
        }
        else
        {
            File.AppendAllText(path, "Hello World");
        }

如果这对您有帮助，请评价
最好的问候

if this help you please rate
best regards

错误是由于路径字符串构造时的强制转换问题引起的.更新的代码应为:

Error is due to casting issue at path string construction. Updated code should be:

string path= string.Format(@"C:/Documents and Settings/aj99823/Desktop/project/{yyyy-mm-dd}.txt",System.DateTime.Now.ToString("yyyy-MM-dd ));

应该可以.

It should work.

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