創建一個CSV文件，而不是添加到下一列

Question

第一次試圖建立在C＃中的csv文件，這裏是代碼：

string FilePath = @"C:\Users\me\Downloads\csvfiles\test-" + DateTime.Now.ToString("dd-MM-yyyy-hh-mm-ss") + ".csv"; 
string delimit = ","; 
List<string> cells = new List<string>(); 

Console.WriteLine("Gathering the data..."); 

SqlConnection con = new SqlConnection(Properties.Settings.Default.ConnectionString); 
con.Open(); 
SqlCommand cmd = new SqlCommand(); 
cmd.Connection = con; 
cmd.CommandType = System.Data.CommandType.Text; 
cmd.CommandText = "SELECT id, name FROM contacts"; 

SqlDataReader reader = cmd.ExecuteReader(); 

Console.WriteLine("Building the csv file"); 

while (reader.Read()) 
{ 
    AddCell((IDataRecord)reader, cells); 
} 

StringBuilder sb = new StringBuilder(); 

for (int i = 0; i < cells.Count; i++) 
{ 
    sb.AppendLine(string.Join(delimit, cells[i])); 
} 

File.WriteAllText(FilePath, sb.ToString()); 

/*Method to add each record to the list*/ 
public static void AddCell(IDataRecord record, List<string> cells) 
{ 
    cells.Add(record[0].ToString()); 
    cells.Add(record[1].ToString()); 
} 

麻煩的是，它附加一切到一個新行，這不是將記錄[1]移到下一列並開始一個新行...

Answer 1

您的For循環對於您嘗試執行的操作不正確。

替換：

for (int i = 0; i < cells.Count; i++) 
    { 
     sb.AppendLine(string.Join(delimit, cells[i])); 
    } 

隨着

int i = 0; 
    while (i < cells.Count) 
    { 
     sb.AppendLine(string.Join(delimit, cells[i],cells[i+1])); 
     i = i + 2; 
    } 

Answer 2

string FilePath = @"C:\Users\me\Downloads\csvfiles\test-" + DateTime.Now.ToString("dd-MM-yyyy-hh-mm-ss") + ".csv"; 
string delimit = ","; 
List<string> cells = new List<string>(); 

Console.WriteLine("Gathering the data..."); 

SqlConnection con = new SqlConnection(Properties.Settings.Default.ConnectionString); 
con.Open(); 
SqlCommand cmd = new SqlCommand(); 
cmd.Connection = con; 
cmd.CommandType = System.Data.CommandType.Text; 
cmd.CommandText = "SELECT id, name FROM contacts"; 

SqlDataReader reader = cmd.ExecuteReader(); 

Console.WriteLine("Building the csv file"); 

while (reader.Read()) 
{ 
    AddCell((IDataRecord)reader, cells); 
} 

StringBuilder sb = new StringBuilder(); 

for (int i = 0; i < cells.Count; i++) 
{ 
    if (cells[i].Equals("\n")) 
    { 
     sb.Append(Environment.NewLine); 
    } 
    else 
    { 
     sb.Append(cells[i]); 
    } 
} 

File.WriteAllText(FilePath, sb.ToString()); 

/*Method to add each record to the list*/ 
public static void AddCell(IDataRecord record, List<string> cells) 
{ 
    cells.Add(record[0].ToString()); 
    cells.Add(","); 
    cells.Add(record[1].ToString()); 
    cells.Add("\n"); 
} 

不優雅的你@cvraman但它的工作太:)我將使用您的解決方案。