将具有自定义对象类型的列的DataGrid绑定到DataTable

Question

I have DataTable and I am trying to bind DataGrid with DataTable. But my columns are not of simple type, they are of custom Objects.

public class Node
    {
        public string Name { get; set; }
        public int Id { get; set; }

        public Node(string name, int id)
        {
            Name = name;
            Id = id;
        }
    }

public class NodeBool
    {
        public bool Name { get; set; }
        public int Id { get; set; }

        public Node(bool name, int id)
        {
            Name = name;
            Id = id;
        }
    }


     <DataGrid Name="data1" AutoGenerateColumns="True" ItemsSource="{Binding MyDataTable}" />

The columns are not known before execution. They are known at runtime based on a list, ad list is used to add columns in the datatable

When I bind it to datagrid, For each row under column full class name is displayed. I want to bind it to class property and depending on the property checkbox (bool) or textbox (string) should be displayed.

I am following MVVM model.

Answer 1

you have to use in below mentioned code.

public class NodeBool
{
    public bool Name { get; set; }
    public int Id { get; set; }

    public NodeBool(bool name, int id)
    {
        Name = name;
        Id = id;
    }
}

then you have to declare the ObservableCollection like

 private ObservableCollection<NodeBool> _MyData=new ObservableCollection<NodeBool>();

    public ObservableCollection<NodeBool> MyData
    {
        get { return _MyData; }
        set { _MyData = value; RaisePropertyChanged("MyData"); }
    }

and then you have to enter the value in collecton like

  MyData.Add(new NodeBool(true,1));

and your datagrid look like

<DataGrid ItemsSource="{Binding MyData}" AutoGenerateColumns="False">
        <DataGrid.Columns>
            <DataGridCheckBoxColumn MinWidth="150" Header="Name" Binding="{Binding Name}"/>
            <DataGridTextColumn MinWidth="180" Header="Id" Binding="{Binding Id}"/>
        </DataGrid.Columns>
    </DataGrid>

Answer 2

What you can do is Change your Code Likes this

 <DataGrid Name="data1" AutoGenerateColumns="True" ItemsSource="{Binding Path=.}" />

and in Code Behind you can do is

Create a one DataTable and Add Columns in that and add Data in that

 DataTable dataTable=new DataTable();

//for loop getting all properties of object using reflection dataTable.Columns.Add(item.Name);

//for loop for gettting all the information in dataTable

DataRow  dr;

//add each value like this

dr=dataTable.NewRow();

dr[propertyName] = object.Propertyname;

dataTable.Rows.Add(dr);
   dataTable.AcceptChanges();

// then bind that table to datagrid.

   data1.ItemSource = dataTable.DefaultView 

or

   data1.DataContext = dataTable; 

Exact Code Base will look like this Here I assume that your source of information will be list of class of type(Node class) it will convert it to respective dataTable and will show the datagrid

public void ConvertListToDataTable()
{
    DataTable dt = new DataTable();
    Node obj = new Node();
    //here obj is instance of your node type
    foreach (var item in obj.GetType().GetProperties())
    {
        dt.Columns.Add(item.Name);
    }

    List<Node> objDetails = new List<Node>();
    Node objNode = new Node();
    objNode.Name = true;
    objNode.Id = "Test B";

    Node objNode1 = new Node();
    objNode1.Name = false;
    objNode1.Id = "Test B 1";

    objDetails.Add(objNode);
    objDetails.Add(objNode1);

    DataRow dr;
    for (int i = 0; i < objDetails.Count; i++)
    {
        dr = dt.NewRow();
        foreach (var item in obj.GetType().GetProperties())
        {
            dr[item.Name] = objDetails[i].GetType().GetProperty(item.Name).GetValue(objDetails[i], null);
        }
        dt.Rows.Add(dr);
    }

    dt.AcceptChanges();
    data1.ItemsSource = dt.DefaultView;
}