从数据库读出数据到excel完整代码

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using Excel = Microsoft.Office.Interop.Excel;

using System.IO;

using System.Reflection;

using System.Data.Sql;

using System.Data.SqlClient;

namespace ExcleTest

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

DataTable dt;

private void button1_Click(object sender, EventArgs e)

{

string connStr = "Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=RiskAssesment;Data Source=.";

SqlConnection conn = new SqlConnection(connStr);

conn.Open(); //打开数据库

SqlCommand cmd = new SqlCommand();

cmd.Connection = conn;

cmd.CommandText = "select * from PipeClass";

SqlDataAdapter sda = new SqlDataAdapter(cmd.CommandText, conn);

DataSet ds = new DataSet();

sda.Fill(ds);

dataGridView1.DataSource = ds.Tables[0];

dt = ds.Tables[0];

conn.Close();

}

private void button2_Click(object sender, EventArgs e )

{

string s=@"G:\c#\ExcleTest\ExcleTest\XLS\11.xls";

CreateExcel(dt,s);

}

public void CreateExcel(DataTable dt, string fileName)

{

System.Diagnostics.Process[] arrProcesses;

arrProcesses = System.Diagnostics.Process.GetProcessesByName("Excel");

foreach (System.Diagnostics.Process myProcess in arrProcesses)

{

myProcess.Kill();

}

Object missing = Missing.Value;

Microsoft.Office.Interop.Excel.Application m_objExcel =

new Microsoft.Office.Interop.Excel.Application();

Microsoft.Office.Interop.Excel.Workbooks m_objWorkBooks = m_objExcel.Workbooks;

Microsoft.Office.Interop.Excel.Workbook m_objWorkBook = m_objWorkBooks.Add(true);

Microsoft.Office.Interop.Excel.Sheets m_objWorkSheets = m_objWorkBook.Sheets; ;

Microsoft.Office.Interop.Excel.Worksheet m_objWorkSheet =

(Microsoft.Office.Interop.Excel.Worksheet)m_objWorkSheets[1];

int intFeildCount = dt.Columns.Count;

for (int col = 0; col < intFeildCount; col++)

{

m_objWorkSheet.Cells[1, col + 1] = dt.Columns[col].ToString();

}

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

{

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

{

m_objWorkSheet.Cells[intRowCount + 2, intCol + 1] = "'" + dt.Rows[intRowCount][intCol].ToString();

}

}

if (File.Exists(fileName))

{

File.Delete(fileName);

}

m_objWorkBook.SaveAs(fileName, missing, missing, missing, missing,

missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange,

missing, missing, missing, missing, missing);

m_objExcel = null;

}

}

}