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Posted by / 30-Jun-2019 23:47

: Hace uso de la propiedad On Client Click para definir el método javascript definido en la pagina.Un punto importante es el uso de return como antecesor el nombre de la función On Client Click="return Confirmacion();" El objetivo de este es evitar el postback del botón cuando no se acepte el mensaje de confirmación.The Grid View 'Grid View1' fired event Page Index Changing which wasn't handled.The Grid View 'Grid View1' fired event Sorting which wasn't handled.We can implement it in this way without a performance impact because the data is not actually retrieved from the database until required, so we can build up a chain of queries up to that point and only the end result will be pulled from the database. When manually databinding the Grid View, this will always show ascending, so we need to handle this manually with the following logic: After that we save the new Sort Expression.We’re sorting on the appropriate field based on the Sort Expression, and setting the direction based on Sort Direction by calling either the Order By or Order By Descending methods. As with paging, we also reset the Edit Index and Selected Index when sorting.The required actions for paging to work are setting the new page index, setting the Data Source, and calling Data Bind (the last two through the Bind Data method).In addition to that, we’re resetting the Edit Index and Selected Index when the page is changed to avoid cases, for example, where you change pages and are suddenly editing a different item.

: Hace uso de código javascript en línea directo en el evento, sin utilizar una función definida para tratar la confirmación.en realidad es otra forma valida de lograr lo mismo.Suele suceder que a veces se necesita crear script con cierto dinamismo que solo se logra con código .net, de esta forma ese código javascript creado puede asignarse a un evento en un control para ser ejecutado.The original method shown above did not implement any sorting, but now that we have a place to store the Sort Expression and Sort Direction we need to change that.After specifying the query, we add the appropriate sorting. When you bind a Grid View through a Data Source ID, the Grid View will update this value since it is internally tracking the sort expression, so it knows when to switch between ascending and descending.

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The example shown here is for a Grid View, but the same types of event handlers must be implemented in roughly the same way for other data controls including the Form View, Details View, and List View. This is the final Grid View markup, so you can see the event handlers we’re going to implement.

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