C#中将DataTable中数据导出到csv文件中

在上一篇博文【C#读取CSV文件的方法】中，我介绍了读取csv文件中数据的方法，现在我来介绍下将datatable中的数据导出到csv文件中的方法，废话不

多说了，deme程序的代码如下：

protected void Button1_Click(object sender, EventArgs e)

{

DataTable dt = new DataTable();

dt.Columns.Add("test1");

dt.Columns.Add("test2");

dt.Columns.Add("test3");

dt.Columns.Add("test4");

dt.Columns.Add("test5");

for (int i = 0; i < 6; i++)

{

dt.Rows.Add();

dt.Rows[i][0] = "CN"+i.ToString();

dt.Rows[i][1] = "EN"+i.ToString();

dt.Rows[i][2] = "JN"+i.ToString();

dt.Rows[i][3] = "HK"+i.ToString();

dt.Rows[i][4] = "TW"+i.ToString();

}

ExportDataGridToCSV(dt);

}

/// <summary>

/// Export the data from datatable to CSV file

/// </summary>

/// <param name="grid"></param>

public void ExportDataGridToCSV(DataTable dt)

{

string strFile = "";

string path = "";

//File info initialization

strFile = "test";

strFile = strFile + DateTime.Now.ToString("yyyyMMddhhmmss");

strFile = strFile + ".csv";

path = Server.MapPath(strFile);

System.IO.FileStream fs = new FileStream(path, System.IO.FileMode.Create, System.IO.FileAccess.Write);

StreamWriter sw = new StreamWriter(fs, new System.Text.UnicodeEncoding());

//Tabel header

for (int i = 0; i < dt.Columns.Count; i++)

{

sw.Write(dt.Columns[i].ColumnName);

sw.Write("\t");

}

sw.WriteLine("");

//Table body

for (int i = 0; i < dt.Rows.Count; i++)

{

for (int j = 0; j < dt.Columns.Count; j++)

{

sw.Write(DelQuota(dt.Rows[i][j].ToString()));

sw.Write("\t");

}

sw.WriteLine("");

}

sw.Flush();

sw.Close();

DownLoadFile(path);

}

private bool DownLoadFile(string _FileName)

{

try

{

System.IO.FileStream fs = System.IO.File.OpenRead(_FileName);

byte[] FileData = new byte[fs.Length];

fs.Read(FileData, 0, (int)fs.Length);

Response.Clear();

Response.AddHeader("Content-Type", "application/notepad");

string FileName = System.Web.HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(_FileName));

Response.AddHeader("Content-Disposition", "inline;filename=" + System.Convert.ToChar(34) + FileName + System.Convert.ToChar(34));

Response.AddHeader("Content-Length", fs.Length.ToString());

Response.BinaryWrite(FileData);

fs.Close();

System.IO.File.Delete(_FileName);

Response.Flush();

Response.End();

return true;

}

catch (Exception ex)

{

ex.Message.ToString();

return false;

}

}

/// <summary>

/// Delete special symbol

/// </summary>

/// <param name="str"></param>

/// <returns></returns>

public string DelQuota(string str)

{

string result = str;

string[] strQuota ={ "~", "!", "@", "#", "$", "%", "^", "&", "*", "(", ")", "`", ";", "'", ",", ".", "/", ":", "/,", "<", ">", "?" };

for (int i = 0; i < strQuota.Length; i++)

{

if (result.IndexOf(strQuota[i]) > -1)

result = result.Replace(strQuota[i], "");

}

return result;

}