CODEWITHSUNDEEP
c#wpfbindingdatagrid
PiousVenom
PiousVenom

Reputation: 6918

Bind DataGrid to List<T>, but only show selection of T's properties

So, there's a custom class, Material:

class Material
{
    public string Qty { get; set; }
    public string Description { get; set; }
    public string Supplier { get; set; }
    public string PONumber { get; set; }
    public string RigName { get; set; }
    public string ProjectName { get; set; }
    public string ShipTo { get; set; }
    public string ShipVia { get; set; }

    public Material()
    {
        Qty = "5";
        Description = "This is a test";
        Supplier = "Wal-Mart";
        PONumber = "23423";
        RigName = "Test Rig";
        ProjectName = "Test Project";
        ShipTo = "Kevin";
        ShipVia = "Danny";
    }
}

I have a list of Material:

var myList = new List<Material>
                 {
                     new Material()
                 };

And it's set as the item source for my DataGrid:

dataGrid1.ItemsSource = myList;

Now, in the XAML, if I set the AutoGenerateColumns="True", it creates the headers for dataGrid1 based upon the properties of Material. However, I only want 4 columns, Qty, Description, Supplier, and PONumber. So, I wrote the following:

 <DataGrid AutoGenerateColumns="False"
                          Name="dataGrid1">
                    <DataGrid.Columns>
                        <DataGridTextColumn Header="Qty"
                                            Binding="{Binding XPath=@Qty}" />

                        <DataGridTextColumn Header="Description"
                                            Binding="{Binding XPath=@Description}" />

                        <DataGridTextColumn Header="Supplier"
                                            Binding="{Binding XPath=@Supplier}" />

                        <DataGridTextColumn Header="PO#"
                                            Binding="{Binding XPath=@PONumber}" />
                    </DataGrid.Columns>
                </DataGrid>

My problem is that now, dataGrid1 is empty. I have the feeling I'm missing something completely silly, and I'm hoping a fresh pair of eyes can help me spot this.

So, my question is, am I going about this the wrong way? Is there a way to bind the List<Material> to dataGrid1 and only show the columns that I want?

The websites I based my attempts on are here and here.

Upvotes: 1

Views: 259

Answers (3)

sa_ddam213
sa_ddam213

Reputation: 43616

You seem to be tring to Bind to an XPath which is used for direct Xml bindings, You only need to use Path or just declare the property.

Example:

 <DataGridTextColumn Header="Qty" Binding="{Binding Qty}" />

Upvotes: 1

Tilak
Tilak

Reputation: 30718

Instead of XPath, try Path and give exact proprty name without $.

XPath is used for xml based data source. For objects, Path property binding is used.

Upvotes: 1

Thomas Levesque
Thomas Levesque

Reputation: 292565

Your bindings are wrong: you should use Path instead of XPath. The XPath property is only used when binding to an XML data source.

<DataGridTextColumn Header="Qty" Binding="{Binding Path=Qty}" />

Note that you can omit the "Path=" part for brevity:

<DataGridTextColumn Header="Qty" Binding="{Binding Qty}" />

Upvotes: 2

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