控制台应用程序文件夹中未生成CSV

Question

I want to generate a CSV file in my folder with the data coming from datatable . I have written the below code for that.

public static void CreateCSV(DataTable dt, string FileName)
    {
        try
        {
            string strFilePath = ConfigurationSettings.AppSettings["ExcelFilePath"].ToString() + "\\" + FileName;
            if (!Directory.Exists(ConfigurationSettings.AppSettings["ExcelFilePath"].ToString()))
                Directory.CreateDirectory(ConfigurationSettings.AppSettings["ExcelFilePath"].ToString());

            StreamWriter sw = new StreamWriter(strFilePath, false);
            DataTable dTemp = dt;

            int iColCount = dTemp.Columns.Count;
            for (int i = 0; i < iColCount; i++)
            {
                sw.Write(dTemp.Columns[i]);
                if (i < iColCount - 1)
                {
                    sw.Write(",");
                }
            }
            sw.Write(sw.NewLine);

            foreach (DataRow dr in dTemp.Rows)
            {
                for (int i = 0; i < iColCount; i++)
                {
                    if (!Convert.IsDBNull(dr[i]))
                    {

                        if (dr[i].ToString().Contains("\n"))
                        {
                            string x = dr[i].ToString().Replace("\n", "");
                            string xc = RemoveSpecialCharacters(x);
                            string xc1 = RemoveSpecialCharacters1(xc);
                            //sw.Write(x);
                            sw.Write(xc1.Replace(", ", ""));
                        }
                        else
                        {
                            string x = dr[i].ToString().Replace(",", "");
                            string xc = RemoveSpecialCharacters(x);
                            string xc1 = RemoveSpecialCharacters1(xc);                                
                            sw.Write(xc1.Replace(", ", ""));                               
                        }
                    }
                    if (i < iColCount - 1)
                    {
                        sw.Write(",");
                    }
                }
                sw.Write(sw.NewLine);
            }
            sw.Close();               
        }
        catch (Exception ex)
        {
            //ErrorLog.Insert(ex.Message, ex.StackTrace, "Program.cs - MailReport", null);
        }
    }

And the folder path which I have set in app.config file is below

<add key="ExcelFilePath" value="ExcelData" />

but still the csv is not getting created. Am I missing something, kindly help

Answer 1

You still have a relative path not an absolute one. You need an absolute one.

Use

strFilePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, ConfigurationSettings.AppSettings["ExcelFilePath"].ToString(), FileName);

and

Directory.CreateDirectory(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, ConfigurationSettings.AppSettings["ExcelFilePath"].ToString()));

to create the directory. No need to check if directory exists, CreateDirectory will only try to create it if it does not exist.