C#数据导出到Excel源代码

最近工作中需要做一个把用户信息作为excel导出的功能，就顺便整理搜集了一些常用的导出文件的源代码，以供以后不时之需，也希望能给大家带来一些方便

一、DataSet数据集内数据转化为Excel

// 作用：把DataSet数据集内数据转化为Excel文件
// 描述：这些关于Excel的导出方法，基本可以实现日常须要，其中有些方法可以把数据导出后
// 生成Xml格式，再导入数据库！ 
// 备注：请引用Office相应COM组件，导出Excel对象的一个方法要调用其中的一些方法和属性。

public void DataSetToExcel(DataSet ds,string FileName)
{
   try
   {
      //Web页面定义
      //System.Web.UI.Page mypage=new System.Web.UI.Page(); 

      HttpResponse resp;
      resp=HttpContext.Current.Response;
      resp.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312");
      resp.AppendHeader("Content-disposition","attachment;filename="+FileName+".xls");
      resp.ContentType="application/ms-excel"; 

      //变量定义
      string colHeaders=null;
      string Is_item=null; 

      //显示格式定义//////////////// 

      //文件流操作定义
      //FileStream fs=new FileStream(FileName,FileMode.Create,FileAccess.Write);
      //StreamWriter sw=new StreamWriter(fs,System.Text.Encoding.GetEncoding("GB2312")); 

      StringWriter sfw=new StringWriter();
      //定义表对象与行对象，同时用DataSet对其值进行初始化
      System.Data.DataTable dt=ds.Tables[];
      DataRow[] myRow=dt.Select();
      int i=;
      int cl=dt.Columns.Count; 

      //取得数据表各列标题，各标题之间以\t分割，最后一个列标题后加回车符
      for(i=;i<cl;i++)
      {
         //if(i==(cl-1))  //最后一列，加\n
         // colHeaders+=dt.Columns[i].Caption.ToString();
         //else
         colHeaders+=dt.Columns[i].Caption.ToString()+"\t";
      }
      sfw.WriteLine(colHeaders);
      //sw.WriteLine(colHeaders); 

      //逐行处理数据
      foreach(DataRow row in myRow)
      {
         //当前数据写入
         for(i=;i<cl;i++)
         {
          //if(i==(cl-1))
          //   Is_item+=row[i].ToString()+"\n";
          //else
          Is_item+=row[i].ToString()+"\t";
         }
         sfw.WriteLine(Is_item);
         //sw.WriteLine(Is_item);
         Is_item=null;
      }
      resp.Write(sfw);
      //resp.Clear();
      resp.End();
   }
   catch(Exception e)
   {
      throw e;
   }
}

二、DataSet数据集内数据转化为Excel文件（2）

/// <summary>
/// 作用：把DataSet数据集内数据转化为Excel文件
/// 描述：导出Excel文件
/// 备注：请引用Office相应COM组件，导出Excel对象的一个方法要调用其中的一些方法和属性。

/// </summary>

public class ExportFiles
{
    private string filePath = "";
    public ExportFiles(string excel_path)
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
        filePath = excel_path;
    }
    /// <summary>
    /// 将指定的Dataset导出到Excel文件
    /// </summary>
    /// <param name="dt"></param>
    /// <returns></returns>
    public bool ExportToExcel(System.Data.DataSet ds, string ReportName)
    {
        if (ds.Tables[].Rows.Count == )
        {
            MessageBox.Show("数据集为空");
        }
        Microsoft.Office.Interop.Excel._Application xlapp = new ApplicationClass();
        Workbook xlbook = xlapp.Workbooks.Add(true);
        Worksheet xlsheet = (Worksheet)xlbook.Worksheets[];
        Range range = xlsheet.get_Range(xlapp.Cells[, ], xlapp.Cells[, ds.Tables[].Columns.Count]);
        range.MergeCells = true;
        xlapp.ActiveCell.FormulaR1C1 = ReportName;
        xlapp.ActiveCell.Font.Size = ;
        xlapp.ActiveCell.Font.Bold = true;
        xlapp.ActiveCell.HorizontalAlignment = Microsoft.Office.Interop.Excel.Constants.xlCenter;
        int colIndex = ;
        int RowIndex = ;
        //开始写入每列的标题
        foreach (DataColumn dc in ds.Tables[].Columns)
        {
            colIndex++;
            xlsheet.Cells[RowIndex, colIndex] = dc.Caption;
        }
        //开始写入内容
        int RowCount = ds.Tables[].Rows.Count;//行数
        for (int i = ; i < RowCount; i++)
        {
            RowIndex++;
            int ColCount = ds.Tables[].Columns.Count;//列数
            for (colIndex = ; colIndex <= ColCount; colIndex++)
            {
                xlsheet.Cells[RowIndex, colIndex] = ds.Tables[].Rows[i][colIndex - ];//dg[i, colIndex - 1];
                xlsheet.Cells.ColumnWidth = ds.Tables[].Rows[i][colIndex - ].ToString().Length;
            }
        } 

        xlbook.Saved = true;
        xlbook.SaveCopyAs(filePath);
        xlapp.Quit();
        GC.Collect();
        return true;
    } 

    public bool ExportToExcelOF(System.Data.DataSet ds, string ReportName)
    {
        if (ds.Tables[].Rows.Count == )
        {
            MessageBox.Show("数据集为空");
        }
        string FileName = filePath; 

        //System.Data.DataTable dt = new System.Data.DataTable();
        FileStream objFileStream;
        StreamWriter objStreamWriter;
        string strLine = "";
        objFileStream = new FileStream(FileName, FileMode.OpenOrCreate, FileAccess.Write);
        objStreamWriter = new StreamWriter(objFileStream, System.Text.Encoding.Unicode); 

        strLine = ReportName;
        objStreamWriter.WriteLine(strLine);
        strLine = ""; 

        for (int i = ; i < ds.Tables[].Columns.Count; i++)
        {
            strLine = strLine + ds.Tables[].Columns[i].ColumnName.ToString() + "          " + Convert.ToChar();
        }
        objStreamWriter.WriteLine(strLine);
        strLine = ""; 

        for (int i = ; i < ds.Tables[].Rows.Count; i++)
        {
            strLine = strLine + (i + ) + Convert.ToChar();
            for (int j = ; j < ds.Tables[].Columns.Count; j++)
            {
                strLine = strLine + ds.Tables[].Rows[i][j].ToString() + Convert.ToChar();
            }
            objStreamWriter.WriteLine(strLine);
            strLine = "";
        }
        objStreamWriter.Close();
        objFileStream.Close(); 

        //Microsoft.Office.Interop.Excel._Application xlapp = new ApplicationClass();
        //Workbook xlbook = xlapp.Workbooks.Add(true);
        //Worksheet xlsheet = (Worksheet)xlbook.Worksheets[1];
        //Range range = xlsheet.get_Range(xlapp.Cells[1, 1], xlapp.Cells[1, ds.Tables[0].Columns.Count]);
        //range.EntireColumn.AutoFit();
        //xlapp.Quit();
        return true;
    }
}

三、导出GridView到Excel

//导出GridView到Excel中的关键之处
//用法： ToExcel(GVStaff, TextBox1.Text);

public static void ToExcel(System.Web.UI.Control ctl,string FileName)
{
    HttpContext.Current.Response.Charset ="UTF-8";
    HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
    HttpContext.Current.Response.ContentType ="application/ms-excel";
    HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename="+""+FileName+".xls");
    ctl.Page.EnableViewState =false;
    System.IO.StringWriter  tw = new System.IO.StringWriter();
    HtmlTextWriter hw = new HtmlTextWriter(tw);
    ctl.RenderControl(hw);
    HttpContext.Current.Response.Write(tw.ToString());
    HttpContext.Current.Response.End();
}         

必须有下面这句！否则不会通过！
public override void VerifyRenderingInServerForm(Control control)
{
    // Confirms that an HtmlForm control is rendered for
}

四、DataTable导出到Excel

public class DataTableToExcel
 {
  private DataTableToExcel()
  { 

  }
  /// <summary>
  /// 导出Excel
  /// </summary>
  /// <param name="dt">要导出的DataTable</param>
  public static void ExportToExcel(System.Data.DataTable dt )
  {
   if (dt == null) return; 

   Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
   if (xlApp == null)
   {
    // lblMsg.Text = "无法创建Excel对象，可能您的电脑未安装Excel";
    MessageBox.Show( "无法创建Excel对象，可能您的电脑未安装Excel" );
    return;
   }
   System.Windows.Forms.SaveFileDialog saveDia = new SaveFileDialog();
   saveDia.Filter = "Excel|*.xls";
   saveDia.Title = "导出为Excel文件";
   if(saveDia.ShowDialog()== System.Windows.Forms.DialogResult.OK
    && !string.Empty.Equals(saveDia.FileName))
   {
    Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
    Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
    Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[];//取得sheet1
    Microsoft.Office.Interop.Excel.Range range = null;
    long totalCount = dt.Rows.Count;
    long rowRead = ;
    float percent = ;
    string fileName = saveDia.FileName;
    //写入标题
    for (int i = ; i < dt.Columns.Count; i++)
    {
     worksheet.Cells[, i + ] = dt.Columns[i].ColumnName;
     range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[, i + ];
     //range.Interior.ColorIndex = 15;//背景颜色
     range.Font.Bold = true;//粗体
     range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;//居中
     //加边框
     range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null);
     //range.ColumnWidth = 4.63;//设置列宽
     //range.EntireColumn.AutoFit();//自动调整列宽
     //r1.EntireRow.AutoFit();//自动调整行高
    }
    //写入内容
    for (int r = ; r < dt.DefaultView.Count; r++)
    {
     for (int i = ; i < dt.Columns.Count; i++)
     {
      worksheet.Cells[r + , i + ] = dt.DefaultView[r][i];
      range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[r + , i + ];
      range.Font.Size = ;//字体大小
      //加边框
      range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null);
      range.EntireColumn.AutoFit();//自动调整列宽
     }
     rowRead++;
     percent = ((float)( * rowRead)) / totalCount;
     System.Windows.Forms.Application.DoEvents();
    }
    range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
    if (dt.Columns.Count > )
    {
     range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
    }
    try
    {
     workbook.Saved = true;
     workbook.SaveCopyAs(fileName);
    }
    catch (Exception ex)
    {
     //lblMsg.Text = "导出文件时出错,文件可能正被打开！\n" + ex.Message;
     MessageBox.Show( "导出文件时出错,文件可能正被打开！\n" + ex.Message );
     return;
    } 

    workbooks.Close();
    if (xlApp != null)
    {
     xlApp.Workbooks.Close();
     xlApp.Quit();
     int generation = System.GC.GetGeneration(xlApp);
     System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);
     xlApp = null;
     System.GC.Collect(generation);
    }
    GC.Collect();//强行销毁
    #region 强行杀死最近打开的Excel进程
    System.Diagnostics.Process[] excelProc = System.Diagnostics.Process.GetProcessesByName("EXCEL");
    System.DateTime startTime = new DateTime();
    int m, killId = ;
    for (m = ; m < excelProc.Length; m++)
    {
     if (startTime < excelProc[m].StartTime)
     {
      startTime = excelProc[m].StartTime;
      killId = m;
     }
    }
    if (excelProc[killId].HasExited == false)
    {
     excelProc[killId].Kill();
    }
    #endregion
    MessageBox.Show( "导出成功!" );
   }
  }
 } 

五、DataTable导出到excel（2）

StringWriter stringWriter = new StringWriter();
HtmlTextWriter htmlWriter = new HtmlTextWriter( stringWriter );
DataGrid excel = new DataGrid();
System.Web.UI.WebControls.TableItemStyle AlternatingStyle = new TableItemStyle();
System.Web.UI.WebControls.TableItemStyle headerStyle = new TableItemStyle();
System.Web.UI.WebControls.TableItemStyle itemStyle = new TableItemStyle();
AlternatingStyle.BackColor = System.Drawing.Color.LightGray;
headerStyle.BackColor =System.Drawing.Color.LightGray;
headerStyle.Font.Bold = true;
headerStyle.HorizontalAlign = System.Web.UI.WebControls.HorizontalAlign.Center;
itemStyle.HorizontalAlign = System.Web.UI.WebControls.HorizontalAlign.Center;;  

excel.AlternatingItemStyle.MergeWith(AlternatingStyle);
excel.HeaderStyle.MergeWith(headerStyle);
excel.ItemStyle.MergeWith(itemStyle);
excel.GridLines = GridLines.Both;
excel.HeaderStyle.Font.Bold = true;
excel.DataSource = dt.DefaultView;//输出DataTable的内容
excel.DataBind();
excel.RenderControl(htmlWriter); 

string filestr = "d:\\data\\"+filePath;  //filePath是文件的路径
int pos = filestr.LastIndexOf( "\\");
string file = filestr.Substring(,pos);
if( !Directory.Exists( file ) )
{
  Directory.CreateDirectory(file);
}
System.IO.StreamWriter sw = new StreamWriter(filestr);
sw.Write(stringWriter.ToString());
sw.Close();