topic Re: Binding different lists to different rows in DataGrid in Revit API Forum

Binding different lists to different rows in DataGrid

mizrachi_amir2 — Sun, 21 Apr 2024 06:41:24 GMT

Hello,

I know this question is more WPF oriented but I am still posting it in this forum.

I am not using MVVM yet and am trying to bind different list to different row in DataGrid.

I have 2 lists:

private List<string> roundProfileTypeNames; private List<string> rectProfileTypeNames;

and I have a DataGrid as follows:

Each row contains a profile name + a checkbox which is checked if profile is rounded (taken from a parameter in the profile type) + a list of profile types which should be taken from the 2 lists above:

If "Is Rounded Profile" is checked then "Profile Type" should be binded to roundProfileTypeNames list, otherwise (unchecked) it should be binded to rectProfileTypeNames.

Currently, I was only able to bind all rows to the same list (roundProfileTypeNames OR rectProfileTypeNames).

This is my datagrid in xaml file:

And this is a snippet from my xaml.cs file:

bridgeProfileList = new List<ProfileItem>(); foreach (Element elem in framingPipeTypesCol) // Iterating through all framing pipe types in Revit { ProfileItem ep = new ProfileItem() { ProfileName = elem.Name, ProfileElement = elem }; IList<Parameter> pipe_shape_circle = elem.GetParameters("Pipe Shape_Circle"); if (pipe_shape_circle.Count > 0) { int pipe_shape = pipe_shape_circle[0].AsInteger(); if (pipe_shape == 0) { ep.IsRound = false; //ProfileType.ItemsSource = rectProfileTypeNames; } if (pipe_shape == 1) { ep.IsRound = true; //ProfileType.ItemsSource = roundProfileTypeNames; } } bridgeProfileList.Add(ep); Debug.WriteLine(elem.Name); } profilePropsGrid.ItemsSource = bridgeProfileList; ProfileType.ItemsSource = roundProfileTypeNames;

How can I bind the correct list if checkbox is checked/unchecked?

Thank you!

Re: Binding different lists to different rows in DataGrid

jeremy_tammik — Sun, 21 Apr 2024 08:13:07 GMT

I don't know WPF myself, so I asked Meta AI for you. It replies:

To achieve this, you can create a property in your ProfileItem class that returns the correct list based on the IsRound property. Here's an example:

In your ProfileItem class, add a property like this:

public List<string> ProfileTypeList
{
    get { return IsRound ? roundProfileTypeNames : rectProfileTypeNames; }
}

Then, in your XAML, bind the ItemsSource of the DataGridComboBoxColumn to this new property:

Xaml

<DataGridComboBoxColumn Width="100" Header="Profile Type" x:Name="ProfileType" 
    SelectedValueBinding="{Binding ProfileType, Mode=TwoWay}"  
    ItemsSource="{Binding ProfileTypeList}" 
    DisplayMemberPath="{Binding ProfileType}" />

This way, when the IsRound property changes, the ProfileTypeList property will return the correct list, and the DataGridComboBoxColumn will update its items accordingly.

Note that I assume roundProfileTypeNames and rectProfileTypeNames are already defined and populated in your code. If not, you'll need to make sure they are properly initialized and accessible.

Does that help?

Re: Binding different lists to different rows in DataGrid

mizrachi_amir2 — Sun, 21 Apr 2024 10:43:41 GMT

I did the same, here is how my ProfileItem class looks like (there are many rows below of initializing the 2 lists):

internal class ProfileItem { public string ProfileName { get; set; } public bool IsRound { get; set; } public string ProfileType { get; set; } public Element ProfileElement { get; set; } public List<string> ProfileTypeList { get { return IsRound ? roundProfileTypeNames : rectProfileTypeNames; } } public List<string> rectProfileTypeNames = new List<string>(); public List<string> roundProfileTypeNames = new List<string>(); public ProfileItem(string name, Element elem) { this.ProfileName = name; this.ProfileElement = elem; rectProfileTypeNames.Add("RHS 50x30 / 2.6"); rectProfileTypeNames.Add("RHS 50x30 / 3.2"); rectProfileTypeNames.Add("RHS 50x30 / 4"); rectProfileTypeNames.Add("RHS 50x30 / 5"); ... ... } }

I also add ItemsSource="{Binding ProfileTypeList}" to my xaml file:

But now my ProfileType column shows me empty lists in all DataGrid rows:

I can see in my ProfileItem class that ProfileTypeList shows "0 references":

I think that the binding doesn't take place. Isn't it?