Hi,

After setting a data grid control's items source, I want to access the data row for each item I've added. There are more columns in the grid than properties on the item, and I would like to set their values. After reading the documentation, I tried the GetContainerFromItem method, but it returns null.  My code looks like (with names simplified):

datagrid.ItemsSource = serviceCallResult[];

DataRow row; 

 foreach (item in datagrid.ItemsSource as serviceCallResult[])

{

    row = datagrid.GetItemFromContainer(item) as DataRow;

    ... 

}

 The documentation said that every item in the grid has a container so this seems very odd, and my guess is that I made a mistake in providing data to the grid. Also, I did try to call the GetItemFromContainer method without the cast and just assign the result to a DependencyObject, and it was also null. Thanks in advance for any help.

 

Only the items that are visible in the viewport have containers, so if you calling GetContainerFromItem on an item that is in the current context but does not have a container, null will be returned (this was not clear in the documentation, I will add this information).

For what reason do you need to access all the containers? Maybe there is another solution to your scenario. 

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Technical Writer - Xceed Software

Of all the things I've lost, I miss my mind the most. - Mark Twain

The reason for accessing the containers is that I would like to provide additional information in the grid that is not stored in the database (like a description field for a flag). My idea was to add columns to the the grid, and after the items source is set, to populate those additional fields by accessing the Cells array in the DataRow.

If the fields are also present (albeit empty) in the data source, then  you could access the data item directly to feed the missing data rather than using the container.

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Technical Writer - Xceed Software

Of all the things I've lost, I miss my mind the most. - Mark Twain

Dear Xceed Team,

 

Any update on this?

 

 

I am trying to loop through all the data rows within the grid and set their visibility, but couldn't access all the data rows within the grid.

 

Is there any way to do this ?

 

Kr. 

Only the data items that are in the viewport have containers (i.e., DataRows). It will not be possible to loop through them all to set their visibility. You could create a style that sets it though.

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Technical Writer - Xceed Software

Of all the things I've lost, I miss my mind the most. - Mark Twain