PRotectedvoidbtn_Upload_Click(objectsender, EventArgs e)
{stringserverPath = Server.MapPath("Upload");if(!System.IO.Directory.Exists(serverPath))//判断文件的目录是否存在{
System.IO.Directory.CreateDirectory(serverPath);//如果文件目录不存在，创建文件目录}if(file_upload.HasFile)//判断是否选择了控件{intfileSize =this.file_upload.PostedFile.ContentLength /1024/1024;//获取上传文件的大小if(fileSize >8)//如果上传文件的大小大于8兆{
Page.ClientScript.RegisterStartupScript(this.GetType(),"","alert('只允许上传小于8兆的文件')",true);return;
}else{
file_upload.SaveAs(serverPath+"\\"+ file_upload.FileName);//文件保存到服务器的指定目录下Page.ClientScript.RegisterStartupScript(this.GetType(),"","alert('上传文件成功！！')",true);
}
}else{
Page.ClientScript.RegisterStartupScript(this.GetType(),"","alert('请选择要上传的文件')",true);return;
}
}