public string UpImg()
{
string filetype;
filetype=File1.PostedFile.ContentType;
if(File1.PostedFile.FileName=="")
{
return "noimg";
} if(filetype!="image/gif" && filetype!="image/pjpg " && filetype!="image/pjpeg" && filetype!="image/bmp")
{
Response.Write("<script>alert('对不起!你上传的应该是图片!')</script>");
return "error";
}
else
{
System.Drawing.Image img= System.Drawing.Image.FromStream(File1.PostedFile.InputStream);
int Width = img.Width;
int Height = img.Height;
if(Width>200 || Height>100 || File1.PostedFile.ContentLength>1024*1024*2)
{
Response.Write("<script>alert('对不起!文件尺寸或大小不对!')</script>");
return "error";
}
else
{
int L;
L=File1.PostedFile.FileName.Length;
L=L-4;
filetype=File1.PostedFile.FileName.Substring(L,4);
string sPath=Server.MapPath("")+"\\"+"img"+"\\";
sPath+=Session["userid"].ToString()+house.GetDateTime().Replace(" ",null)+filetype;
this.File1.PostedFile.SaveAs(sPath);
Response.Write("<script>alert('图片上传成功!')</script>");
return "\\"+"img"+"\\"+Session["userid"].ToString()+house.GetDateTime().Replace(" ",null)+filetype;
} }
{
string filetype;
filetype=File1.PostedFile.ContentType;
if(File1.PostedFile.FileName=="")
{
return "noimg";
} if(filetype!="image/gif" && filetype!="image/pjpg " && filetype!="image/pjpeg" && filetype!="image/bmp")
{
Response.Write("<script>alert('对不起!你上传的应该是图片!')</script>");
return "error";
}
else
{
System.Drawing.Image img= System.Drawing.Image.FromStream(File1.PostedFile.InputStream);
int Width = img.Width;
int Height = img.Height;
if(Width>200 || Height>100 || File1.PostedFile.ContentLength>1024*1024*2)
{
Response.Write("<script>alert('对不起!文件尺寸或大小不对!')</script>");
return "error";
}
else
{
int L;
L=File1.PostedFile.FileName.Length;
L=L-4;
filetype=File1.PostedFile.FileName.Substring(L,4);
string sPath=Server.MapPath("")+"\\"+"img"+"\\";
sPath+=Session["userid"].ToString()+house.GetDateTime().Replace(" ",null)+filetype;
this.File1.PostedFile.SaveAs(sPath);
Response.Write("<script>alert('图片上传成功!')</script>");
return "\\"+"img"+"\\"+Session["userid"].ToString()+house.GetDateTime().Replace(" ",null)+filetype;
} }
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<% @Import Namespace="System.IO" %>
<% @ Import Namespace="System.Data" %>
<% @ Import Namespace="System.Data.SqlClient" %><script runat="server">
public void UploadBtn_Click (Object sender, EventArgs e){
//FileStream fs = new FileStream(MyFile.Value, FileMode.OpenOrCreate, FileAccess.Read);
//byte[] MyData= new byte[fs.Length];
//fs.Read(MyData, 0, System.Convert.ToInt32(fs.Length));
//fs.Close();
//得到提交的文件
Stream fileDataStream = MyFile.PostedFile.InputStream;//得到文件大小
int fileLength = MyFile.PostedFile.ContentLength;//创建数组
byte[] fileData = new byte[fileLength];//把文件流填充到数组
fileDataStream.Read(fileData,0,fileLength);//得到文件名字
string fileTitle = MyFileName.Value;//得到文件类型
string fileType = MyFile.PostedFile.ContentType;//构建数据库连接,SQL语句,创建参数
SqlConnection connection = new SqlConnection("Server=(local);uid=sa;pwd=;Database=pubs");
SqlCommand command = new SqlCommand ("INSERT INTO TestFiles (MyFileName,MyFile,FileType)" +
"VALUES (@MyFileName,@MyFile,@FileType)", connection);SqlParameter paramTitle = new SqlParameter ("@MyFileName", SqlDbType.VarChar,35);
paramTitle.Value = fileTitle;
command.Parameters.Add(paramTitle);SqlParameter paramData = new SqlParameter ("@MyFile", SqlDbType.Image);
paramData.Value = fileData;
command.Parameters.Add(paramData);SqlParameter paramType = new SqlParameter ("@FileType", SqlDbType.VarChar,25);
paramType.Value = fileType;
command.Parameters.Add(paramType);//打开连接,执行查询
connection.Open();
command.ExecuteNonQuery();
connection.Close();Message.Text="你的文件已经成功上载";
MyFileName.Value = "";
}
</script>
<hr>
<asp:label id="Message" Text="选择文件和文件名字:" runat="server"/>
<hr>
<form method="post" enctype="multipart/form-data" runat="server">
<b>文件名字:</b><input id="MyFileName" type="text" runat="server">
<P>
<b>文件:</b><input id="MyFile" type="file" runat="server">
<br/><br/>
<input type=submit value="开始上传" OnServerclick="UploadBtn_Click" runat="server">
</form>
{
public class UPLOAD : System.Web.UI.Page
{
protected System.Web.UI.WebControls.LinkButton LinkButton1; #region User Defined Code
protected System.Web.UI.WebControls.Label Label1;
private void Page_Load(System.Object sender, System.EventArgs e)
{
if ( this.IsPostBack )
this.SaveImages();
} private System.Boolean SaveImages() {
//loop through the files uploaded System.Web.HttpFileCollection _files = System.Web.HttpContext.Current.Request.Files;
//Message to the user
System.Text.StringBuilder _message = new System.Text.StringBuilder("Files Uploaded:<br>");
try
{
for ( System.Int32 _iFile = 0; _iFile < _files.Count; _iFile ++ )
{
// Check to make sure the uploaded file is a jpg or gif
System.Web.HttpPostedFile _postedFile = _files[_iFile];
System.String _fileName, _fileExtension; _fileName = System.IO.Path.GetFileName(
_postedFile.FileName);
_fileExtension = System.IO.Path.GetExtension(
_fileName); if ( _fileExtension == ".gif" )
{
//Save File to the proper directory
_postedFile.SaveAs(
System.Web.HttpContext.Current.Request.MapPath(
"gifs/") + _fileName);
_message.Append(_fileName + "<BR>");
}
else if ( _fileExtension == ".jpg" )
{ //Save File to the proper directory
_postedFile.SaveAs(
System.Web.HttpContext.Current.Request.MapPath(
"jpgs/") + _fileName);
_message.Append(_fileName + "<BR>");
}
else {
_message.Append(_fileName + " <font color=\"red\">failed!! Only .gif and .jpg images allowed!</font> <BR>");
} }
Label1.Text = _message.ToString();
return true;
}
catch ( System.Exception Ex )
{
Label1.Text = Ex.Message ;
return false;
} }
#endregion #region Web Form Designer generated code
override protected void OnInit(System.EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load); }
#endregion
}
}
可以设置inputfile.accept="image/gif,image/jpg",当然也可以写代码
用inputfile.value.toupper.endwith("GIF") OR inputfile.value.toupper.endwith("JPG")
2.dim i as integer=inputfile.value.lastindexof("/")
dim j as integer=inputifle.value.indexof(".")
dim str as string=inputfile.value.substring(i,j-i)
dim tmp as string=inputfile.value.place(str,datatime.now.tostring)
tmp为换了名后的全路径
然后用inputfile.postedfile.savaas("路径"+inputfile.value.substring(i))
3.用inputfile.size>2222做判断
用response.write("<script>window.alert('error')</script>")提示
4.在try中用inputfile.savaas方法,然后lblnotice.text="success"