How do I add a row to a Datagrid in C# WPF

Question

I have a problem with adding a row to a Datagrid in C# WPF.

I have made a Struct for the data:

public struct MyData
{
    public int id { set; get; }
    public string title { set; get; }
    public int jobint { set; get; }
    public DateTime lastrun { set; get; }
    public DateTime nextrun { set; get; }
}

and a method to add the data:

  private void Add_Data_Grid_Row(object sender, RoutedEventArgs e)
        {
            Button button = sender as Button;
            DockPanel panel = button.Parent as DockPanel;
            DataGrid usedDataGrid = panel.Children.OfType<DataGrid>().FirstOrDefault();

            usedDataGrid.Items.Add(new MyData { id = 11123, title = "King", jobint = 1993123, lastrun = DateTime.Today, nextrun = DateTime.Today  });

        }

Can you help me out somehow?

zen_1991 · Accepted Answer · 2014-09-03 06:30:29Z

1

        DataTable dt = new DataTable();

        DataColumn column;
        DataRow row;
        DataView view;

        row = new DataRow();
        dt.Rows.Add(row);
        column = new DataColumn();
        column.DataType = System.Type.GetType("System.Int32");
        column.ColumnName = "id";
        dt.Columns.Add(column);

        column = new DataColumn();
        column.DataType = Type.GetType("System.String");
        column.ColumnName = "item";
        dt.Columns.Add(column);

        for (int i = 0; i < 10; i++)
        {
            row = dt.NewRow();
            row["id"] = i;
            row["item"] = "item " + i.ToString();
            dt.Rows.Add(row);
        }

        view = new DataView(dt);
        dataView1.ItemsSource = view;

Where dataView1 = Name of your Datagrid.

answered Sep 3, 2014 at 6:30

zen_1991

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Comments

blindmeis · Accepted Answer · 2014-08-26 08:31:42Z

1

 //Use ObservableCollection
 public ObservableCollection<MyData> MySource {get;set;}

 //initialize once, eg. ctor
 this.MySource = new ObservableCollection<MyData>();

 //add items
 this.MySource.Add(new MyData { id = 11123, title = "King", jobint = 1993123, lastrun = DateTime.Today, nextrun = DateTime.Today});

 //set the itemssource
 usedDataGrid.ItemsSource = this.MySource;

or go the MVVM way and use Binding instead of codebehind and setting the itemssource if you dont set AutogenerateColumns to true you have to define your columns with bindings

 <DataGrid ItemsSource="{Binding MySource}" AutogenerateColumns="true"/>

answered Aug 26, 2014 at 8:31

blindmeis

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Comments

Davide Piras · Accepted Answer · 2014-08-26 08:29:33Z

0

if the DataGrid is bound to a data source, the usual way to add/manipulate rows in the control is not acting on the control itself ( which is only showing the content of the bound data source ), but instead, try to simply add / manipulate the content of the datasource itself, for example, add a new struct entry to the struct collection and the DataGrid will reflect such new entry immediately.

answered Aug 26, 2014 at 8:29

Davide Piras

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Comments

Raghu · Accepted Answer · 2014-08-26 08:31:51Z

0

You have to bind the DataGrid to an ObservableCollection. Now whenever you add a new item to the ObservableCollection, the DataGrid would get refreshed with latest changes.

Please take a look at this example: http://www.codeproject.com/Articles/42536/List-vs-ObservableCollection-vs-INotifyPropertyCha

answered Aug 26, 2014 at 8:31

Raghu

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Comments

Hamit YILDIRIM · Accepted Answer · 2014-08-26 08:46:06Z

0

Your Data Structure must be implement an enumeratic interface. For this feture you can add it into an ObservableCollection or any Class which implements IEnumerable (like lists but this not provide observablity but adds your data to list) so this provide you to basic WPF elements implementation Also you have to implement the INotifyPropertyChange interface for regarding model binded events operations if it is a necessaty for you.

answered Aug 26, 2014 at 8:46

Hamit YILDIRIM

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