Pass Datatable Object to Cell C#

2 posts, 0 answers
  1. Charles
    Charles avatar
    7 posts
    Member since:
    Jun 2013

    Posted 15 Jan 2014 Link to this post

    Hi,

    I tried to display some charts in a Grid like the attached picture, so I need to pass the data to the cell and I used following code:

    Random r = new Random ();
      
    GridServer.Rows.Add ("1");
      
    for (int i= 1; i <= 16; i++)
    {
       
       DataTable table = new DataTable ();
       table.Columns.Add ("DateTime", typeof (DateTime));
       table.Columns.Add ("Value", typeof (double));
       table.Rows.Add (DateTime.Now, r.Next (100));
       table.Rows.Add (DateTime.Now.AddSeconds (30), r.Next (100));
       table.Rows.Add (DateTime.Now.AddSeconds (60), r.Next (100));
       table.Rows.Add (DateTime.Now.AddSeconds (90), r.Next (100));
       table.Rows.Add (DateTime.Now.AddSeconds (120), r.Next (100));
       table.Rows.Add (DateTime.Now.AddSeconds (150), r.Next (100));
      
       GridServer.Rows[0].Cells[i].Value = table;
      
    }

    Basing on the definition, the type of GridServer.Rows[0].Cells[i].Value is object

    public class GridViewCellInfo : IEquatable<GridViewCellInfo>
       {
     
         // Summary:
          //     Gets or sets the value.
          public object Value { get; set; }
          //
    }

    So the GridServer.Rows[0].Cells[i].Value should get the reference of my DataTable, but the actually value of Value is a empty string.

    Is this a bug or anything wrong in my code?

    Thanks

    Charles
  2.
  3. Dess | Tech Support Engineer, Sr.
    Admin
    Dess | Tech Support Engineer, Sr. avatar
    3281 posts

    Posted 20 Jan 2014 Link to this post

    Hello Charles,

    Thank you for contacting Telerik Support.

    In order to display a RadChartView in RadGridView's cell, you may use the following approach.
    public Form1()
    {
        InitializeComponent();
     
        GridServer.AutoSizeRows = true;
         
        for (int i = 0; i < 5; i++)
        {
            GridViewImageColumn imageColumn = new GridViewImageColumn("Server " + i);
            imageColumn.ImageLayout = ImageLayout.Zoom;          
            GridServer.Columns.Add(imageColumn);
        }
    }
     
    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);
     
        GridViewRowInfo newRow = GridServer.Rows.NewRow();
        foreach (GridViewColumn column in GridServer.Columns)
        {
            RadChartView chart = new RadChartView();
            LineSeries lineSeria = new LineSeries();
     
            chart.Series.Add(lineSeria);
            lineSeria.HorizontalAxis.LabelFitMode = Telerik.Charting.AxisLabelFitMode.MultiLine;
            lineSeria.ValueMember = "Value";
            lineSeria.CategoryMember = "DateTime";
     
            lineSeria.DataSource = GetChartData();
            chart.LoadElementTree();
          
            Bitmap bmp = new Bitmap(chart.Width, chart.Height, PixelFormat.Format32bppArgb);
            chart.DrawToBitmap(bmp, new Rectangle(0, 0, chart.Width, chart.Height));
            newRow.Cells[column.Name].Value = bmp;
        }
     
        GridServer.Rows.Add(newRow);
    }
     
    private DataTable GetChartData()
    {
        Random r = new Random();
         
        DataTable table = new DataTable();
        table.Columns.Add("DateTime", typeof (DateTime));
        table.Columns.Add("Value", typeof (double));
        for (int i = 1; i <= 5; i++)
        {
            table.Rows.Add(DateTime.Now, r.Next(100));
            table.Rows.Add(DateTime.Now.AddSeconds(30), r.Next(100));
            table.Rows.Add(DateTime.Now.AddSeconds(60), r.Next(100));
            table.Rows.Add(DateTime.Now.AddSeconds(90), r.Next(100));
            table.Rows.Add(DateTime.Now.AddSeconds(120), r.Next(100));
            table.Rows.Add(DateTime.Now.AddSeconds(150), r.Next(100));
        }
     
        return table;
    }

    I hope this information helps. Should you have further questions, I would be glad to help.

    Regards,
    Desislava
    Telerik
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