ASP.NET Tutorial/Development/Graphics

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Mixed drawing

   <source lang="csharp">

<%@ Page language="c#" Inherits="MixedDrawing" CodeFile="Default.aspx.cs" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > <HTML> 

 <HEAD>
   <title>MixedDrawing</title>
   </HEAD>
 <body>
   <form id="Form1" method="post" runat="server">
   </form>
 </body>

</HTML> File: Default.aspx.cs using System; using System.Collections; using System.ruponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; using System.Drawing.Drawing2D; using System.IO; public partial class MixedDrawing : System.Web.UI.Page { 

 protected void Page_Load(object sender, System.EventArgs e)
 {
   Bitmap image = new Bitmap(450, 100);
   Graphics g = Graphics.FromImage(image);
   g.SmoothingMode = SmoothingMode.AntiAlias;
   g.FillRectangle(Brushes.White, 0, 0, 450, 100);
   g.FillEllipse(Brushes.PaleGoldenrod, 120, 13, 300, 50);
   Font font = new Font("Harrington", 20, FontStyle.Bold);
   g.DrawString("Oranges are tasty!", font, Brushes.DarkOrange, 150, 20);
   System.Drawing.Image orangeImage = System.Drawing.Image.FromFile(Server.MapPath("oranges.gif"));
   g.DrawImageUnscaled(orangeImage, 0, 0);
   image.Save(Response.OutputStream,System.Drawing.Imaging.ImageFormat.Gif);
   g.Dispose();
   image.Dispose();
 }

}</source>


Simple Drawing

   <source lang="csharp">

<%@ Page language="c#" Inherits="SimpleDrawing" CodeFile="Default.aspx.cs" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > <HTML> 

 <HEAD>
   <title>SimpleDrawing</title>
   </HEAD>
 <body>
   <form id="Form1" method="post" runat="server">
   </form>
 </body>

</HTML> File: Default.aspx.cs using System; using System.Collections; using System.ruponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; public partial class SimpleDrawing : System.Web.UI.Page { 

 protected void Page_Load(object sender, System.EventArgs e)
 {
   Bitmap image = new Bitmap(300, 50);
   Graphics g = Graphics.FromImage(image);
   g.DrawRectangle(Pens.Green, 0, 0, 299, 49);
   Font font = new Font("Impact", 20, FontStyle.Regular);
   g.DrawString("This is a test.", font, Brushes.Blue, 10, 5);
       image.Save(Response.OutputStream,System.Drawing.Imaging.ImageFormat.Jpeg);
       g.Dispose();
       image.Dispose();
 }

}</source>


ThumbmailViewer

   <source lang="csharp">

<%@ Page language="c#" Inherits="ThumbnailsInDirectory" CodeFile="Default.aspx.cs" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > <HTML> 

 <HEAD>
   <title>ThumbnailsInDirectory</title>
 </HEAD>
 <body>
   <form id="Form1" method="post" runat="server">
     
       <asp:Label id="Label1" runat="server">Directory: </asp:Label> 
       <asp:TextBox id="txtDir" runat="server" Width="343px">c:\Windows\</asp:TextBox>
       <asp:Button id="cmdShow" runat="server" Text="Show Thumbnails" Width="123px" onclick="cmdShow_Click"></asp:Button>
               <asp:GridView ID="gridThumbs" runat="server" AutoGenerateColumns="False" Font-Names="Verdana"
               Font-Size="X-Small" GridLines="None">
               <Columns>
                   <asp:TemplateField>
                   <ItemTemplate>
         <img src="<%# GetImageUrl(Eval("FullName")) %>" />
         <%# Eval("Name") %>

       </ItemTemplate>
                   </asp:TemplateField>
               </Columns>
           </asp:GridView>
   </form>
 </body>

</HTML> File: Default.aspx.cs using System; using System.Collections; using System.ruponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; using System.IO;

public partial class ThumbnailsInDirectory : System.Web.UI.Page { 

 protected void cmdShow_Click(object sender, System.EventArgs e)
 {
   DirectoryInfo dir = new DirectoryInfo(txtDir.Text);
   gridThumbs.DataSource = dir.GetFiles("*.bmp");
   gridThumbs.DataBind();
 }
 protected string GetImageUrl(object path)
 {
   return "Default.aspx?x=50&y=50&FilePath=" +
     Server.UrlEncode((string)path);
 }

} File: NextPage.aspx <%@ Page language="c#" Inherits="ThumbnailViewer" CodeFile="NextPage.aspx.cs" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > <HTML> 

 <HEAD>
   <title>ThumbnailViewer</title>
 </HEAD>
 <body>
   <form id="Form1" method="post" runat="server">
   </form>
 </body>

</HTML> File: NextPage.aspx.cs using System; using System.Collections; using System.ruponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls;

public partial class ThumbnailViewer : System.Web.UI.Page { 

 protected void Page_Load(object sender, System.EventArgs e)
 {
   if ((Request.QueryString["X"] == null) ||(Request.QueryString["Y"] == null) ||(Request.QueryString["FilePath"] == null)){
           return;
   }
      int x = Int32.Parse(Request.QueryString["X"]);
   int y = Int32.Parse(Request.QueryString["Y"]);
   string file = Server.UrlDecode(Request.QueryString["FilePath"]);
   Bitmap image = new Bitmap(x, y);
   Graphics g = Graphics.FromImage(image);
   System.Drawing.Image thumbnail = System.Drawing.Image.FromFile(file);
   g.DrawImage(thumbnail, 0, 0, x, y);
   image.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
   g.Dispose();
   image.Dispose();
 }

}</source>

Источник — «http://nfex.ru/index.php?title=ASP.NET_Tutorial/Development/Graphics&oldid=2630»