求.net文件上傳下載代碼
string path = Server.MapPath("~/upload/");
if (FileUpload1.HasFile)
{
//獲取擴展名
string fileExtension = System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();
//限定只能上傳jpg和gif圖片
string[] allowExtension = { ".jpg", ".gif", ".jpeg", ".bmp" };
for (int i = 0; i < allowExtension.Length; i++)
{
if (fileExtension == allowExtension[i])
{
fileOk = true;
break;
}
}
if (fileOk == false)
{
ScriptManager.RegisterClientScriptBlock(this.UpdatePanel1, this.GetType(), "提示!", "alert('文件類型錯誤!');", true);
}
//對上傳文件的大小進行檢測，限定文件最大不超過1M
if (FileUpload1.PostedFile.ContentLength > 1024000)
{
fileOk = false;
}
if (fileOk)
{
try
{
string pat = path + ReName(fileExtension);
ct.CardImage ="upload/" + ReName(fileExtension);
B2CBll.CardTypeManager.AddCardType(ct);
FileUpload1.PostedFile.SaveAs(pat);
ScriptManager.RegisterClientScriptBlock(this.UpdatePanel1, this.GetType(), "提示!", "alert('添加成功!');", true);
this.BindListBox();
}
catch
{
ScriptManager.RegisterClientScriptBlock(this.UpdatePanel1, this.GetType(), "提示!", "alert('上傳失敗!');", true);
}
}
else
{
ScriptManager.RegisterClientScriptBlock(this.UpdatePanel1, this.GetType(), "提示!", "alert('文件類型或者文件大小超出1M或者文件類型不對');", true);
}
}
}