csv文件導出

 

 void outCsv(string strsql, string filepath)
    ...{
        MyCRM.DB db = new MyCRM.DB();
        if (System.IO.File.Exists(filepath))
        ...{
            System.IO.File.Delete(filepath);
        }
        System.IO.FileStream fsDestFile = System.IO.File.Open(filepath, System.IO.FileMode.OpenOrCreate);
        System.IO.StreamWriter srDestFile = null;
        
        DataTable dt = db.ececSelectSql(strsql);
        string str = "";
        
        foreach (DataRow dr in dt.Rows)
        ...{
            string str1 = "";
            for (int i = 0; i < dr.ItemArray.Length; i++)
            ...{
                switch (dr[i].ToString())
                ...{
                    case "":
                        str1 += " ,"; 
                        break;
                    default:
                        str1 += dr[i].ToString().Trim() + ",";
                        break;
                }
                 
            }
            str1 = str1.Remove(str1.Length - 1, 1) + " ";            
            str += str1;
        }
        srDestFile = new System.IO.StreamWriter(fsDestFile, System.Text.Encoding.Default); //重要
        srDestFile.WriteLine(str);
        srDestFile.Flush();
        srDestFile.Close();
    }