Web Upload image plus watermark

Uploading images and watermarks you need to use the control FileUpload upload button Image control to display uploaded pictures, page dragged into three controls

1<form id="Form1"runat="Server">2<asp:fileupload id="FileUpload1"runat="Server"accept=". Jpg,.jpeg,.png"/>3<asp:button id="Button1"runat="Server"text="Upload"/>4<asp:image id="Image1"runat="Server"/>5</form>

JS End limit does not choose to upload pictures upload pictures too large

1<script>2document.getElementById ("Button1"). onclick =function () {3         varf = document.getElementById ("FileUpload1");4         if(F.value.length <=0)//No files selected for upload5         {6Alert"Please select the uploaded file! ");7             return false;8         }9         if(f.files[0].size > (1024x768*1024x768*Ten))//limit the size of the uploaded file to 10MBTen         { OneAlert"file too large, not allowed to upload! "); A             return false; -         } -     }; the</script>

Select Image click upload Add watermark upload display descendant code on the interface

1 usingSystem.Drawing;//Painting Reference System.Drawing namespaces2 3 protected voidPage_Load (Objectsender, EventArgs e)4     {5Button1.click+=button1_click;//Upload button6     }7 8     voidButton1_Click (Objectsender, EventArgs e)9     {Ten         //2. Create a System.Drawing.Image object and use the FromStream method to System.IO the object OneSystem.Drawing.Image img =System.Drawing.Image.FromStream (fileupload1.filecontent); A        //1. Painting with graphics This class, using the FromImage method to point to the canvas, requires System.Drawing.Image object -Graphics g =graphics.fromimage (IMG); -        //4 Create S-draw content F-font B-Paint brush the        strings ="www.baidu.com"; -Font f =NewFont ("blackbody", the); -Brush B =NewSolidBrush (color.red); -        //3. Draw DrawString method S-drawn content F-font B-brush from where to start drawing +g.DrawString (S, F, B, Max, the ); -        //5 save img. Save to make a saved path +        stringPath ="images/"+ DateTime.Now.ToString ("yyyymmddhhssmm") +Fileupload1.filename; A img. Save (Server.MapPath (path)); at         //page Show Pictures -Image1.imageurl =path;  -}

The page appears as follows:

Web Upload image plus watermark