.net数据导出到excel【Update20111009】

昨天临时要做一个把dataset中的数据导出到excel的功能，同事给了一段代码，功能实现，现分享：

#region 普通的Excel导出
/// <summary>
/// DataTable To Excel
/// </summary>
/// <param name="dt">DataTable Name</param>
/// <param name="typeid">1，Excel 2，XML</param>
/// <param name="FileName">文件名</param>
public void CreateExcel(System.Data.DataTable dt, string typeid, string FileName)
{
HttpResponse resp;
resp = Page.Response;
resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
resp.ContentType = "application/ms-excel";
resp.AddHeader("Content-Disposition",
"attachment; filename=" + System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls");
this.EnableViewState = false;
string colHeaders = "", Is_item = "";
int i = 0;
//定义表对象与行对象，同时使用DataSet对其值进行初始化
DataRow[] myRow = dt.Select("");
//typeid=="1"时导出为Excel格式文件;typeid=="2"时导出为XML文件
if (typeid == "1")
{
//取得数据表各列标题，标题之间以/t分割，最后一个列标题后加回车符
for (i = 0; i < dt.Columns.Count; i++)
{
colHeaders += dt.Columns[i].Caption.ToString() + "/t";
}
colHeaders += "/n";
resp.Write(colHeaders);
//逐行处理数据
foreach (DataRow row in myRow)
{
//在当前行中，逐列取得数据，数据之间以/t分割，结束时加回车符/n
for (i = 0; i < dt.Columns.Count; i++)
{
Is_item += row[i].ToString() + "/t";
}
Is_item += "/n";
resp.Write(Is_item);
Is_item = "";
}
}
else
{
if (typeid == "2")
{
//从DataSet中直接导出XML数据并且写到HTTP输出流中
resp.Write(dt.DataSet.GetXml());
}
}
//写缓冲区中的数据到HTTP头文件中
resp.End();
}
#endregion

在网上又看到一篇更全面的文章，分享地址：/article/5067289.html

现在常用的方式是参考：http://excelpackage.codeplex.com/

实例方法：

string sql = string.Format("select * from ...{0}}", SearchTerms);
string name = "Search" + System.DateTime.Now.ToString("yyMMddHHmmss") + ".xlsx";//文件名
DataTable dt = Biz.csFormDateReport(sql);//数据源
FileInfo template = new FileInfo(Server.MapPath("/Controls/CustomerService/Report/TemplateExcel/MonthFormTemplate.xlsx"));//模板文件
if (dt.Rows.Count > 0)
{
if (!template.Exists) throw new Exception("Template file does not exist!");
using (ExcelPackage pck = new ExcelPackage(template, true))
{
ExcelWorksheet ws = pck.Workbook.Worksheets["FormList"];
if (ws != null)
{
const int startRow = 3;//开始插入数据的行
int row = startRow;
foreach (DataRow dr in dt.Rows)
{
//产品名称	工单属性	类别	结案	未结案	详细描述	个案总结
if (row > startRow) ws.InsertRow(row, 1);
ws.Cells[row, 1].Value = dr["ProjectName"].ToString();
........//填充数据    row++;
}
//delete the two spare rows we have in the template
ws.DeleteRow(row, 1);
row--;

ws.Cells[row + 1, 4].CreateArrayFormula("=SUM(D" + startRow + ":D" + row + ")");//添加计算公式
ws.Cells[row + 1, 5].CreateArrayFormula("=SUM(E" + startRow + ":E" + row + ")");

Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
Response.ContentType = "Application/vnd.ms-Excel";
Response.AddHeader("content-disposition", "attachment;  filename=" + System.Web.HttpUtility.UrlEncode(name, System.Text.Encoding.UTF8) + "");
Response.BinaryWrite(pck.GetAsByteArray());
Response.End();
}
}
}
else
{ this.labInfo.Text = "无数据！"; return; }

Excel模板，合计总计会自动计算出来！