c#中数据从数据库到客户端主要几种的导出方式(导出到excel，导出到word)

protected void btnExport_Click(object sender, EventArgs e)
{

this.dp.pageSize = 9999;//为了导出全部数据,ListView 使用pageSize，但是GridView 可用AllowPaging
this.lvExt.HiddenFields ="c0,c1";//根据id隐藏列
this.lv.DataBind();
Export("application/ms-excel", "场地信息.xls", lv, "场地信息");
this.dp.pageSize = 10;
this.lv.DataBind();
}

protected void btnExport_Load(object sender, EventArgs e)
{
//将控件注册为回发的触发器。 
//该方法用于配置 UpdatePanel 控件内以其他方式执行异步回发的回发控件。
ScriptManager sm = ScriptManager.GetCurrent(this.Page);

if (sm != null)
{
sm.RegisterPostBackControl((Control)sender);
}
}



/// <summary>
/// 导出方法 2014-5-30 bob
/// </summary>
/// <param name="FileType">文件类型</param>
/// <param name="FileName">文件名称</param>
/// <param name="c">装载数据的控件如：ListView,GridView</param>
/// <param name="Title">导出文件的标题</param>
public void Export(string FileType, string FileName, System.Web.UI.Control c, string Title)
{
Response.Clear();
Response.Buffer = true;
Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());
Response.ContentType = FileType; // 设置输出文件类型为excel文件"application/ms-excel"。 
System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
c.RenderControl(oHtmlTextWriter);
string writeString = oStringWriter.ToString();
writeString = "<tr> <td> " + Title + " </td> <tr> " + writeString;
Response.Output.Write(writeString);
Response.Flush();
Response.End();
}

        protected void btnPrint_Click(object sender, EventArgs e)
        {
            //2014-6-8 bob 打印证书  从数据库中把数据导出到word
            
            lvExt.VerifySelectRowCount(Common.UserControl.ListViewExtender.SelectCountMode.OnlyOne);

            //获得学员基本信息数据集
            eTangent.PSMS.PSMSDataContext dc = new eTangent.PSMS.PSMSDataContext();
            eTangent.PSMS.vw_PMInfor pmInfors = dc.vw_PMInfors.FirstOrDefault(p => Convert.ToInt32(p.ID).Equals(this.lvExt.SelectedValues.FirstOrDefault()));

            //生成证书
            Application app = null;
            Document docTemp = null;
            Document doc = null;

            try
            {
                string docPath =
                    string.Format("~/Contacts/CertificateDoc/{0}", pmInfors.Card);

                if (!System.IO.Directory.Exists(Server.MapPath(docPath)))
                {
                    System.IO.Directory.CreateDirectory(Server.MapPath(docPath));//创建文件夹
                }
                object templateName = Server.MapPath(string.Format("~/Contacts/CertificateDoc/Template.doc"));

                app = new Application(); //启用进程

                object nullobj = System.Reflection.Missing.Value;

                docTemp = app.Documents.Open(templateName);

                object CertificateName = Server.MapPath(
                    string.Format("{0}/Certificate.doc", VirtualPathUtility.RemoveTrailingSlash(docPath)));

                docTemp.SaveAs(ref CertificateName);        //把临时doc另存为当前人的证书doc
                docTemp.Close();                            //ref nullobj,ref nullobj,ref nullobj
               // GC.Collect();                             //垃圾回收
                docTemp = null;
                string docCertificateName = Server.MapPath(
                    string.Format("{0}/Certificate.doc", VirtualPathUtility.RemoveTrailingSlash(docPath)));
                doc = app.Documents.Open(docCertificateName);

                //基本信息
          
                foreach (FormField f in doc.FormFields.Cast<FormField>())
                {
                    if (f.Result.Equals("PrintTime"))
                    {
                        f.Range.Text = DateTime.Now.Date.ToShortDateString();
                    }
                    else
                    {
                        //反射  （根据外部的doc文档中的文字域的名字来找到数据集pmInfors中对应的属性）
                        //      其中数据集也可以用dataset来实现
                        System.Reflection.PropertyInfo propInfo =
                            pmInfors.GetType().GetProperty(f.Result);

                        if (propInfo != null)
                        {
                            object pValue = propInfo.GetValue(pmInfors, null);

                            if (pValue != null)
                            {
                                f.Range.Text = pValue.ToString();
                            }
                            else
                            {
                                f.Range.Text = string.Empty;
                            }
                        }
                        else
                        {
                            f.Range.Text = string.Empty;
                        }
                    }
                }

                doc.Save();

                if (docTemp != null)
                {
                    docTemp.Close();
                   // GC.Collect();
                }
                docTemp = null;

                if (doc != null)
                    doc.Close();
                doc = null;

                if (app != null) app.Quit();

                app = null;

                // 下载证书
                string docPrintPath =
                string.Format("~/Contacts/CertificateDoc/{0}//Certificate.doc", pmInfors.Card);
                if (File.Exists(Server.MapPath(docPrintPath)))
                {
                    //btSave.PostBackUrl = docPath;
                    Response.Redirect(docPrintPath); //注意一定要把执行该动作的按钮设置为异步回发（如果按钮在UpdatePanel中）
                }


            }
            catch (Exception ex)
            {
                System.Diagnostics.EventLog.WriteEntry("党校系统错误",
                string.Format("打印证书发生错误： {0}", ex.Message));

                object saveOption = Microsoft.Office.Interop.Word.WdSaveOptions.wdDoNotSaveChanges;

                if (app != null) app.Quit(ref saveOption);
                docTemp = null;
                doc = null;
                app = null;

                throw new Exception(ex.Message);
            }
        }

        protected void btnPrint_PreRender(object sender, EventArgs e)
        {
           
            //将控件注册为回发的触发器。 
            //该方法用于配置 UpdatePanel 控件内以其他方式执行异步回发的回发控件。
            ScriptManager sm = ScriptManager.GetCurrent(this.Page);

            if (sm != null)
            {
                sm.RegisterPostBackControl((Control)sender);
            }
             
        }