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Vasanthakumar
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Access UltraWebgrid within WebMethod
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Hi All, In my application i'm using cellchange handler and pass the cell index to the WebMethod(static method and its return type is string), but it doesn't return anything. my problem is i want to manipulate some process using the passed index and assign the return values to other grid cells. //sample code function CellChange(gridName,cellId) { var oCell = igtbl_getCellById(cellId); var getValue = PageMethods.GetCellID(oCell.Column.Index); // here i will assign this value to some other cells. but i can't get the value from variable getvalue } // My code in the server side. [System.Web.Services.WebMethod] public static string GetCellID(string rowId) { string getID = rowId; // Here i will do some manipulation. return getID; } and also i want to know, can i access webgrid within static webmethod, is their any technique. Please reply me. Thanks in Advance, Regards, Vasanth.
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  • 28464
    posted

    Hello Vasanth,

    Thanks for writing - this is an interesting topic. The problem with WebServices (WebMethods) is that they are not part of the page lifecycle and do not have access to the page control tree. I in fact believe that this is a good thing and by design - since that idea of web-services is to just request/respond to specific needs with custom logic, and not to take the burden of the whole quite complex ASP.NET infrastructure.

    So I believe in your case you may need to change your code to just call an event handler / method on the page, so that the control tree will be available there and you will be able to get instnace of the grid. Calling server-side page methods from client-side javascript is also a tricky topic, but is doable. I can suggest the following article on information how it can be done:

    http://www.dotnetcurry.com/ShowArticle.aspx?ID=109&AspxAutoDetectCookieSupport=1

    The idea is to call a method in the same page where the grid is located and the method will be able to access the controls page Tree, including grids inside. 

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