C# - Convert Response Stream To An Image?
Aug 29, 2010
in previously asked question answeres said they dont get what i want to do exactly so heres is the full code also i simply want that instead of a TABLESe i rendered an image( of the content ) on the page
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.IO;
using System.Text;
using System.Data;
using System.Drawing;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
System.Web.UI.WebControls.Panel panelmain = new System.Web.UI.WebControls.Panel();
System.Web.UI.WebControls.Literal abc = new System.Web.UI.WebControls.Literal();
abc.Text = "as<br/>dasdas<br/>dasdad";
DataSet ds = new DataSet();
DataTable dt;
DataRow dr;
DataColumn idCoulumn;
DataColumn nameCoulumn;
dt = new DataTable();
idCoulumn = new DataColumn("ID", Type.GetType("System.Int32"));
nameCoulumn = new DataColumn("Name", Type.GetType("System.String"));
dt.Columns.Add(idCoulumn);
dt.Columns.Add(nameCoulumn);
dr = dt.NewRow();
dr["ID"] = 1;
dr["Name"] = "Name1";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["ID"] = 2;.............
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Sep 20, 2010
Is is possible to update an image on an HTML page using the response stream of an ASP.NET Generic Handler? For example, if I have the following code on a handler: [URL]
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "image/png";
context.Response.WriteFile("~/images/test.png");
}
How can I call the handler in jQuery, using .ajax, and set an image on the page equal to the image that is returned by the Handler? I am ignoring the query string variable at the moment as I just want to get this working. Secondly, if I can do above, how can I loop through all of DIVs on the page that are of class "content", select a guid out of a hidden field to use as my query string parameter, and update the associated image within the same content DIV tag? A content div tag would look as follows:
<div class="content">
<asp:TextBox runat="server" Id="HiddenField_1" Value="C142E68F-B118-4565-9A9E-B2347F0B6D5B"/>
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</div>
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<asp:TextBox runat="server" Id="HiddenField_2" Value="GJ38AD23-B118-4565-9A9E-B2347F0B6D5B"/>
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[Code]....
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[code]....
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Aug 29, 2010
in pageload
{
panelmain.Controls.Add(abc);
panelmain.Controls.Add(grid1);
string toexport;
toexport = RenderControl(panelmain);
ImageFormatConverter imgc = new ImageFormatConverter();
System.Drawing.Image convertedimage;
convertedimage = (System.Drawing.Image) imgc.ConvertFromString(toexport);
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Response.BufferOutput = true;
Response.Charset = "utf-8";
Response.Write(convertedimage);
Response.End();
//form1.Controls.Add(abc);
}
public string RenderControl(Control ctrl)
{
StringBuilder sb = new StringBuilder();
StringWriter tw = new StringWriter(sb);
HtmlTextWriter hw = new HtmlTextWriter(tw);
ctrl.RenderControl(hw);
Response.Write(sb);
return sb.ToString();
}
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get
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