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------------------------------上传文件------------------------------------------­

string fullFileName=this.Filel.PostedFile.FileName;­

string fullName=fullFileName.Substring(fullFileName.LastIndexOf("\\")+1);­

this.Filel.PostedFile.SaveAs(Server.MapPath("up")+"\\"+fileName);­

------------------------------判断是否是图片------------------------------------------­

string fullFileName=this.Filel.PostedFile.FileName;­

string fullName=fullFileName.Substring(fullFileName.LastIndexOf("\\")+1);­

string type=fullFileName.Substring(fullFileName.LastIndexOf(".")+1);­

if(type=="jpg"||type=="bmp"||type=="gif")­

{­

this.Filel.PostedFile.SaveAs(Server.MapPath("up")+"\\"+fileName);­

}­

else­

{­

Response.Write("<script language='javascript'>alert('你选择的图片格式错误！');</script>");­

}­

------------------------------将图片在页面上进行显示------------------------------------------­

string fullFileName=this.Filel.PostedFile.FileName;­

string fullName=fullFileName.Substring(fullFileName.LastIndexOf("\\")+1);­

string type=fullFileName.Substring(fullFileName.LastIndexOf(".")+1);­

if(type=="jpg"||type=="bmp"||type=="gif")­

{­

this.Filel.PostedFile.SaveAs(Server.MapPath("up")+"\\"+fileName);­

this.Image1.ImageUrl="up/"+fileName;­

}­

else­

{­

Response.Write("<script language='javascript'>alert('你选择的图片格式错误！');</script>");­

}­