Binary Data in Data Grid :: C#

valikac

Hello. Given an array of binary data stored in an ArrayList container, do you associate the container as a datasource in a Data Grid control? private ArrayList xList = new ArrayList(); // Arbitrarily add 64 integers into container for (int i = 0; i < 64; ++i) this.xList.Add(i); // Assuming Data Grid was created via wizard thisTheDataGrid.DataSource = this.xList; thisTheDataGrid.Refresh(); The example above compiles okay. However, nothing shows up in the data grid. All you would see is 64 empty rows and no columns. Do you need to set a specific property to show arbitrary data in the grid? Thanks, Kuphryn

Heath Stewart

You can use any IList or IListSource implementation (ArrayList implements IList). If you have any DataGridTableStyles configured in the DataGrid.TableStyles property, you must set the DataGridTableStyle.MappingName to the type, i.e. "ArrayList", so that it is mapped correctly.

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valikac

Okay. Thanks. I tried inserting "ArrayList" as the mapping name for the tablestyle. That did not make a difference. The problem is still that nothing shows up in the Data Grid. In fact, there are no grid line. All I see are row borders. Kuphryn

Heath Stewart

If you are using table styles and they don't apply to the current data binding, that what you should expect to see. Instead of an ArrayList, use an int[] array and use "int[]" as the DataGridTableStyle.MappingName. See the documentation for DataGridTableStyle.MappingName in the .NET Framework SDK for more information. Are you even using table styles? If so, maybe try not adding them and you should see something. Again, a data source can be anything that implements IList or IListSource. Some controls' DataSource properties will even except IEnumerable implementations as a last resort.

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