Binding different lists to different rows in DataGrid

[mizrachi_amir2]

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:

<DataGrid Name="profilePropsGrid" Width="500" CanUserReorderColumns="False" HorizontalAlignment="Center" CanUserAddRows="False" VerticalAlignment="Top" AutoGenerateColumns="False">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Profile Name" Width="*" Binding="{Binding ProfileName, Mode=TwoWay}" IsReadOnly="true" />
        <DataGridTemplateColumn Header="Is Rounded Profile?" Width="*">
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <CheckBox IsChecked="{Binding IsRound}" Checked="IsRoundChecked" Unchecked="IsRoundUnchecked" />
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
        </DataGridTemplateColumn>
        <DataGridComboBoxColumn Width="100" Header="Profile Type" x:Name="ProfileType" 
             SelectedValueBinding="{Binding ProfileType, Mode=TwoWay}"  
            DisplayMemberPath="{Binding ProfileType}" />
    </DataGrid.Columns>
</DataGrid>

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!

[jeremy_tammik]

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:

C#

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?

[mizrachi_amir2]

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:

<DataGrid Name="profilePropsGrid" Width="500" CanUserReorderColumns="False" HorizontalAlignment="Center" CanUserAddRows="False" VerticalAlignment="Top" AutoGenerateColumns="False">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Profile Name" Width="*" Binding="{Binding ProfileName}" IsReadOnly="true" />
        <DataGridTemplateColumn Header="Is Rounded Profile?" Width="*" >
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <CheckBox IsChecked="{Binding Path=IsRound}" Checked="IsRoundChecked" Unchecked="IsRoundUnchecked" />
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
        </DataGridTemplateColumn>
        <DataGridComboBoxColumn Width="100" Header="Profile Type" x:Name="ProfileType" 
             SelectedValueBinding="{Binding Path=ProfileType}"  
             ItemsSource="{Binding ProfileTypeList}"
            DisplayMemberPath="{Binding ProfileType}" />
    </DataGrid.Columns>
</DataGrid>

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?