Control | Upload always use someone else's control, the first time you want to write a control. Then wrote a simple small control, mainly for their own learning and other want to try to write the control of friends, please advise.
The main role of the control is to upload the local picture to the custom directory.
Using System;
Using System.Web.UI;
Using System.Web.UI.WebControls;
Using System.ComponentModel;
Using System.Web.UI.HtmlControls;
Using System.IO;
Namespace Uploadimage
{
<summary>
Author: Darkangel 2004-10-27 Day of Creation
Support image upload to server function
</summary>
[Defaultproperty ("Text"),
ToolBoxData (@ "<{0}:upimage runat=server></{0}:upimage>")]
public class Upimage:control, INamingContainer
{
protected int filelength;
protected string ImageUrl;
protected string mydirectory;
static string Logourl;
protected string vpicture;
Public Button MyButton;
Public HtmlInputFile FileUpload;
Public Label Label1;
Public Upimage ()
{
This. EnsureChildControls ();
}
[Bindable (True),
Category ("appearance"),
DefaultValue ("")]
[
DescriptionAttribute ("File Size")
]
public int Filelength
{
Set{filelength=value;}
Get{return Filelength;}
}
[
DescriptionAttribute ("Picture name")
]
public string ImageUrl
{
Set{imageurl=value;}
Get{return ImageUrl;}
}
[
DescriptionAttribute ("File path")
]
public string Mydirectory
{
Get{return mydirectory;}
Set{mydirectory=value;}
}
[
DescriptionAttribute ("Relative address of picture")
]
public string Logo
{
Get{return Logourl;}
Set{logourl=value;}
}
[
DescriptionAttribute ("Show Pictures")
]
public string Vpicture
{
Set{vpicture=value;}
Get{return Vpicture;}
}
private void MyButton_Click (object sender, System.EventArgs e)
{
if (!fileupload.value.tostring (). Equals (""))
{
Logourl=fileupload.postedfile.filename.tostring ();
Logourl=logourl.substring (Logourl.lastindexof ("."), (Logourl.length-logourl.lastindexof ("."));
if (fileupload.postedfile.contentlength>filelength)
{
MyScript ("The picture exceeds the specified size!") ");
}
Else
{
if (Logourl.equals (". jpg") | | Logourl.equals (". bmp") | | Logourl.equals (". gif"))
{
logourl=mydirectory+ "\" +imageurl+logourl;
Mydirectory=page.server.mappath ("") + "\" +mydirectory;
if (directory.exists (mydirectory))
{
}
Else
{
Directory.CreateDirectory (mydirectory);
}
FileUpload.PostedFile.SaveAs (Page.Server.MapPath ("") + "\" +logourl);
if (vpicture. Equals ("1"))
{
label1.text= "}
MyScript ("Picture upload success!") ");
}
Else
{
MyScript ("Wrong file type!") ");
}
}
}
}
protected void MyScript (string java)
{
Page.registerstartupscript ("FSF", "<script Language=javascript>alert" (' +java+ ");</script>");
}
protected override void CreateChildControls ()
{
Mybutton=new Button ();
Fileupload=new HtmlInputFile ();
Label1=new Label ();
MyButton. Text= "Submit";
This. Controls.Add (FileUpload);
This. Controls.Add (MyButton);
This. Controls.Add (New LiteralControl ("<p>"));
This. Controls.Add (LABEL1);
This. Controls.Add (New LiteralControl ("</p>"));
MyButton. Click+=new EventHandler (MyButton_Click);
}
}
}
