前端js代码：
function QueryExcel() {
var data = Ext.getCmp("frmMain").GetValues();// 获取json数据
Ext.Ajax.request({
url: '../Services/ReportExportHandler.ashx', // Webservice的地址以及方法名
jsonData: data,
method: 'POST' ，// poste 方式传递
//success: function (result) {
//},
//failure: function (result) {
//}
});
}
一般处理程序代码：
string fileName = HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes("111.csv"));
//string fileName = HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(dto.Name + ".csv"));
context.Server.ScriptTimeout = 600;
context.Response.ContentType = "application/octet-stream";
context.Response.Charset = "gb2312";
context.Response.AddHeader("Content-Disposition", string.Format("attachment;filename=\"{0}\"", fileName));
context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
DataTable dt = this.GetReportExcuteData(dto, paramsValues).Tables[0];
byte[] bs = ExportHelper.GetMemoryBytes(dt);
context.Response.BinaryWrite(bs);
context.Response.End();
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