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Elin
205
Re-binding Data to igGrid Issues
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We are using igGrid to display different data sources as grids. Since the grid data source is fetched dependent on the structure of a database table that is user controlled we cannot beforehand know the collection of columns or their data type. Due to this we are auto generating columns when binding the data to the grid.

This works fine so long as the user keeps looking at the same view (the same collection of columns). When changing views however the old views' columns aren't cleared. This means if the user was looking at a view with 10 columns and then switched to a view with 4 columns, the new view will have the first 4 columns from the current view and the following 6 columns from the old view.

When binding data to the grid we are using:

$("#dataGrid").igGrid({
        schemaGenerated: generateSchema,
        columnsgenerated: generateColumns,
        autoGenerateColumns: true,
        defaultColumnWidth: "150px",
        width: "100%",
        dataSource: data,
        dataSourceType: "json",
        responseDataKey: "data",
        features: gridFeatures
    });

Is there a way to force refresh on the existing grid data source so that it completely drops the old columns?

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A related issue is that we are using remote paging, sorting and filtering in our grids since the data source can become quite extensive. We are letting the database handle that part and return a controlled size subset of rows that we bind to the grid. The cost of this is that we need to re-bind data using the same code as shown above, after every paging, filtering or sorting activity. The problem is that after re-binding the data, the filtering and sorting properties seem to be cleared off the grid and we need to programmatically write them to the grid again. Is there a way to avoid doing this?

A simple example would be clicking a column header to sort it which would indeed sort the column as expected by re-binding with a new data source that contains a sorted subset of the grid data. But the graphical indicator that the column is sorted will be cleared when re-binding the grid so the user won't get the graphical feedback of the column being sorted. Same goes for filtering, the filter text field is cleared and so is the filter option.

Is there a way to handle remote paging, sorting and filtering without re-binding the data fully? Can you re-bind only the data partially so that it doesn't clear the filter and sorting properties?

We are using ASP.NET and igniteUI v. 13.1.