GridView与Excel数据导入导出

GridView与Excel数据导入导出

一、将GridView的数据导入到Excel表格中

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace FileManageDll
{
/// <summary>
/// 将页面的控件上的数据导入到文件中公共类
/// 需要在调用的页面中重写VerifyRenderingInServerForm方法，否则将出现错误
/// public override void VerifyRenderingInServerForm( Control control )
/// {
/// }
///
/// </summary>
public class HtmlDataToDoc
{
private Page _InvokePage;
/// <summary>
/// 调用的页面
/// </summary>
public Page InvokePage
{
get { return _InvokePage; }
set { _InvokePage = value; }
}

/// <summary>
/// 构造函数
/// </summary>
/// <param name="invoke_page">调用的页面，一般参数传this.Page就可以了</param>
public HtmlDataToDoc(Page invoke_page)
{
_InvokePage = invoke_page;
}

/// <summary>
/// 将GridView的数据导入到Excel表格中
/// </summary>
/// <param name="gdv">页面的GridView</param>
/// <param name="fileName">默认的Excel文件名</param>
public void GridViewDataToExcel( System.Web.UI.WebControls.GridView gdv ,string fileName)
{
if(fileName.ToLower().IndexOf(".xls") == -1)
{
fileName = fileName + ".xls";
}

Export(gdv, fileName, "application/ms-excel");
}

/// <summary>
/// 将GridView的数据导入到Word文件中
/// </summary>
/// <param name="gdv">页面的GridView</param>
/// <param name="fileName">默认的Word文件名</param>
public void GridViewDataToWord( System.Web.UI.WebControls.GridView gdv, string fileName )
{
if(fileName.ToLower().IndexOf(".doc") == -1)
{
fileName = fileName + ".doc";
}

Export(gdv, fileName, "application/ms-word");
}

/// <summary>
/// 导入数据
/// </summary>
/// <param name="gdv"></param>
/// <param name="fileName"></param>
/// <param name="typeName"></param>
private void Export( System.Web.UI.WebControls.GridView gdv, string fileName, string typeName )
{
System.Web.HttpResponse httpResponse = _InvokePage.Response;
httpResponse.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
httpResponse.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
httpResponse.ContentType = typeName;
_InvokePage.EnableViewState = false;
StringWriter tw = new StringWriter();
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);
gdv.RenderControl(hw);
httpResponse.Write(tw.ToString());
httpResponse.End();
}
}
}

页面调用代码：
protected void lbtnToExcel_Click( object sender, EventArgs e )
{
string fileName = "导出数据";

FileManageDll.HtmlDataToDoc hdtd = new FileManageDll.HtmlDataToDoc(this.Page);
hdtd.GridViewDataToExcel(this.gridViewList, fileName);
}

//必须重写改方法
public override void VerifyRenderingInServerForm( Control control )
{
}

并且有一点需要注意的是，页面的EnableViewState必须为True，否则导出的文件数据会为空。

二、将Excel的数据导入到数据库中

public void InsertToDataBase()

{
string sql = "insert into tbStudent(studentNum,studentName,studentClassNum,studentSpecialty,studentDepartment,studentEnrollmentYear) select * from OPENROWSET('MICROSOFT.JET.OLEDB.4.0','Excel 5.0;HDR=YES;DATABASE=" + Server.MapPath("~/excelUpload/") + "uploadStudent.xls',sheet1$)";
StudentBLL stu = new StudentBLL();
int tag = stu.InsertIntoDataBase(sql);
if (tag != 0)
{
alert.showAndGo("导入成功！", "studentInfoQuery.aspx");
}
else
{
alert.show("导入失败！");
}
}

protected void btnImport_Click(object sender, EventArgs e)
{
string HonorPath = @"~/excelUpload/";
if (fpLoad.HasFile)
{
string ext = Path.GetExtension(fpLoad.FileName).ToLower();
if (!(ext == ".xls"))
{
alert.show("上传的文件必须是.xls的文件！");
return;
}
else
{
string logoFile = "uploadStudent.xls";
fpLoad.SaveAs(Server.MapPath(HonorPath + logoFile));
}
}
InsertToDataBase();
}

用上面这种方法，Excel文件的“选项卡”文件名必须是“sheet1”。

下面对InsertToDataBase（）方法做些改进：

public void InsertToDataBase()
{
try
{
string fileName = Server.MapPath("~/excelUpload/") + "uploadStudent.xls";
object opt = System.Reflection.Missing.Value;
Application app = new Application();
_Workbook book = app.Workbooks.Open(fileName, opt, true, opt, opt, opt, true, opt, opt, opt, true, opt, opt, opt, opt); // 只读，可编辑;
Sheets sheets = book.Worksheets;
_Worksheet[] wsArray = new _Worksheet[sheets.Count];
wsArray[0] = (_Worksheet)sheets.get_Item(1);
string sheetName = wsArray[0].Name;
string sql = "insert into tbStudent(studentNum,studentName,studentClassNum,studentSpecialty,studentDepartment,studentEnrollmentYear) select * from OPENROWSET('MICROSOFT.JET.OLEDB.4.0','Excel 5.0;HDR=YES;DATABASE=" + fileName + "'," + sheetName + "$)";
StudentBLL stu = new StudentBLL();
stu.InsertIntoDataBase(sql);
alert.showAndGo("导入成功！", "studentInfoQuery.aspx");
}
catch (Exception ex)
{
alert.show("导入失败！");
}
}