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Whether sorting, grouping or filtering, it will optimize queries to quickly pull only the necessary data.It also does intelligent caching so it doesn’t have to run the same query if it was recently run.We’ll start with binding data to the Grid View, then build up functionality from there.First, we’ll implement a method to databind the Grid View, which will be called whenever databinding needs to be performed.This can be a performance problem with any dataset and it’s a major problem with large datasets.The Developer Express Data Controller (XPOData Source) solves this problem by automatically creating smart queries to fetch just the right amount of data.

Estas clases serán usadas para definir cada témplate de columna: Se define tanto el témplate del Ítem, como el de edición y encabezado, usando para ello el témplate que corresponda, se debe tener presente que también el tipo de dato a mostrar influye en la decisión de que témplate utilizar, un ejemplo muy claro lo representa el checkbox que marca si el televisor es de plasma o no, representado por un témplate que justamente dibuja un check en la celda.I am trying to retrieve them from SAVE button but the same error appears. The Row Data Bound event happens before the user is prompted to enter values on the gridview. To access the new values you need to handle a different event; namely the Row Updating. Look at this demo for the code: reason this is probably happening is because viewstate is loaded after the Init Complete event, but the binding of your gridview is most likey on page_load, therefore it may be effectively overwriting the value that the viewstate had loaded, because it happened afterwards and was an item template field rather than an auto field.

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Try to bind the data in your gridview in the Page_Init Complete method e.g.

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