从DataGridView导出Excel

从DataGridView导出Excel的两种情况，不多说，直接记录代码（新建类，直接引用传入参数）。

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.IO;

using System.Data;

namespace cnblogs

{

public static class LoadExcel

{

//从DataGridView中导出Excel，若s为null则直接导出DataGridView中的内容

public static void DataToExcel(DataGridView m_DataView,string s)

{

SaveFileDialog kk = new SaveFileDialog();

kk.Title = "保存EXECL文件";

kk.Filter = "EXECL文件(*.xls) |*.xls |所有文件(*.*) |*.*";

kk.FilterIndex = 1;

if (kk.ShowDialog() == DialogResult.OK)

{

string FileName = kk.FileName;// +".xls";

if (File.Exists(FileName))

File.Delete(FileName);

FileStream objFileStream;

StreamWriter objStreamWriter;

string strLine = "";

objFileStream = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.Write);

objStreamWriter = new StreamWriter(objFileStream, System.Text.Encoding.Unicode);

objStreamWriter.WriteLine(s); //统计结果信息

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

{

if (m_DataView.Columns[i].Visible == true)

{

strLine = strLine + m_DataView.Columns[i].HeaderText.ToString() + Convert.ToChar(9);

}

}

objStreamWriter.WriteLine(strLine);

strLine = "";

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

{

if (m_DataView.Columns[0].Visible == true)

{

if (m_DataView.Rows[i].Cells[0].Value == null)

strLine = strLine + " " + Convert.ToChar(9);

else

strLine = strLine + m_DataView.Rows[i].Cells[0].Value.ToString() + Convert.ToChar(9);

}

for (int j = 1; j < m_DataView.Columns.Count; j++)

{

if (m_DataView.Columns[j].Visible == true)

{

if (m_DataView.Rows[i].Cells[j].Value == null)

strLine = strLine + " " + Convert.ToChar(9);

else

{

string rowstr = "";

rowstr = m_DataView.Rows[i].Cells[j].Value.ToString();

if (rowstr.IndexOf("\r\n") > 0)

rowstr = rowstr.Replace("\r\n", " ");

if (rowstr.IndexOf("\t") > 0)

rowstr = rowstr.Replace("\t", " ");

strLine = strLine + rowstr + Convert.ToChar(9);

}

}

}

objStreamWriter.WriteLine(strLine);

strLine = "";

}

objStreamWriter.Close();

objFileStream.Close();

MessageBox.Show("导出成功！");

}

}

//用DataGridView绑定的DataTable为参数,导出Excel

public static void DataToExcel(DataTable m_DataTable)

{

SaveFileDialog kk = new SaveFileDialog();

kk.Title = "保存EXECL文件";

kk.Filter = "EXECL文件(*.xls) |*.xls |所有文件(*.*) |*.*";

kk.FilterIndex = 1;

if (kk.ShowDialog() == DialogResult.OK)

{

string FileName = kk.FileName + ".xls";

if (File.Exists(FileName))

File.Delete(FileName);

FileStream objFileStream;

StreamWriter objStreamWriter;

string strLine = "";

objFileStream = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.Write);

objStreamWriter = new StreamWriter(objFileStream, System.Text.Encoding.Unicode);

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

{

strLine = strLine + m_DataTable.Columns[i].Caption.ToString() + Convert.ToChar(9);

}

objStreamWriter.WriteLine(strLine);

strLine = "";

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

{

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

{

if (m_DataTable.Rows[i].ItemArray[j] == null)

strLine = strLine + " " + Convert.ToChar(9);

else

{

string rowstr = "";

rowstr = m_DataTable.Rows[i].ItemArray[j].ToString();

if (rowstr.IndexOf("\r\n") > 0)

rowstr = rowstr.Replace("\r\n", " ");

if (rowstr.IndexOf("\t") > 0)

rowstr = rowstr.Replace("\t", " ");

strLine = strLine + rowstr + Convert.ToChar(9);

}

}

objStreamWriter.WriteLine(strLine);

strLine = "";

}

objStreamWriter.Close();

objFileStream.Close();

}

}

}

}