AJAX :: How To Request And Display Images Asynchronously
Aug 9, 2010
I am working on an ajax application in which user can see chart (an image) of any available product. For generating chart I am using MS-Chart control. User will click a product link, its id will be passed to server side where image will be generated, returned to client side and displayed. All this is to be done asynchronously.
I thought to call a call web method, but what web method will return ?
I tried using HttpHandler but I did not get how to pass parameter (id) to it ?
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on another post i mentioned the problem but simplified it here! I am using ajax slideshow extender and getting images from my database
Datbase table file path example
/ ImageURL
/Members/matt//jeanette4.jpg
Code Behind
//here i open sql connection to database and retrieve images based on GUID of UserId which i add as sql parameter.//
// set the initial image
if (tblData.Rows.Count > 0)
{
imgShowImage.ImageUrl =tblData.Rows[0]["ImageUrl"].ToString();
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}
}
[System.Web.Services.WebMethod]
[System.Web.Script.Services.ScriptMethod]
public static AjaxControlToolkit.Slide[] GetSlides()
{
AjaxControlToolkit.Slide[] slides = new AjaxControlToolkit.Slide[tblData.Rows.Count];
for (int i = 0; i < tblData.Rows.Count; i++)
{
DataRow dr = tblData.Rows[i];
slides[i] = new AjaxControlToolkit.Slide(
dr["ImageUrl"].ToString(),
dr["FirstName"].ToString(),
dr["LastName"].ToString());
}
return slides;
}
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<asp:Image ID="imgShowImage" runat="server"
Height="300px" ImageAlign="Middle" />
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<rewriter>
<rewrite url="~/Matt" to="~/MembersClub/PublicProfile.aspx?Id=a8742959-aa5e-4830-9fc1-94f1b3d0bc41"/>
</rewriter>
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[Code]....
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[Code]....
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