Hi ,

I have a grid view with base 64 image from api. Now I am binding the base 64 image by the way:

private void Gridview_CreateCell(object sender, GridViewCreateCellEventArgs e)
        {
            if (e.Column.Index == 0 && e.Row.RowInfo is GridViewDataRowInfo)
            {
                e.CellElement = new CustomGridImageCellElement(e.Column, e.Row);
            }
        }

CustomGridImageCellElement.cs

 public class CustomGridImageCellElement : GridDataCellElement
    {
        ImagePrimitive _imagePrimitive;
        public CustomGridImageCellElement(GridViewColumn column, GridRowElement row)
            : base(column, row)
        {
        }


        public override void Initialize(GridViewColumn column, GridRowElement row)
        {
            //if (_imagePrimitive == null)
            //{
            _imagePrimitive = new ImagePrimitive();
            _imagePrimitive.Margin = new Padding(3);
            this.Children.Add(_imagePrimitive);
            this.AutoSizeMode = RadAutoSizeMode.WrapAroundChildren;
            //}         
            base.Initialize(column, row);
        }

 protected override void SetContentCore(object value)
        {

     if (this.Value != null && this.Value.ToString() != string.Empty
                && (this.Value.ToString().StartsWith("http") || this.Value.ToString().StartsWith("data:image/")) && _imagePrimitive.Image == null)
            {
                var imageData = this.Value.ToString();
                if (!imageData.StartsWith("http"))
                {
                    byte[] imageBytes = Convert.FromBase64String(imageData.Replace("data:image/JPEG;base64,", ""));
                    // Convert byte[] to Image
                    using (var ms = new MemoryStream(imageBytes, 0, imageBytes.Length))
                    {
                        _imagePrimitive.Image = System.Drawing.Image.FromStream(ms, true);
                    }
                }

It can display image now., but my problem is when scrolling up and down I see it run the custom cell again and it makes SetContentCore run and display error and slowly. How can I avoid it ?

hi~~~

 I need your help~

I want GanttViewTextViewElement export to excel file include hierarchy

I create a radChartView with three bar series and a legend and show it on the form.
Then I change runtime programatically the appearance of the two series (I make them invisible: IsVisible = false), but the legend remains the same.

For comparison - in the MSChart such stupidity is not observed

I have found a few bugs with the Radtreeview during my recent development.  I have submitted them as tickets and have received suggestions or agreement that it was an issue.  I was wondering if these tickets and resolutions that are suggested and my work arounds that I came up with are posted for others to see or just stay under my tickets and no one else gets to learn from them?

Seems like tickets should be shared where resolutions are found for issues.  Not sure if there is a way for the user to make a ticket to share and just make things anonymous or what.  Shame if others are having the same issues as me and don't get to learn from others.  I know I hardly find good solutions in the forums but sure there are good answers out there in other people's tickets.

Thanks

Patrick

Hello,

If I try to add RadCheckedDropDownList and dock it in TableLayoutPanel in newest version of UI for WinControls it crashes with following error (see code below)

The problem is, I have application which has like 40 RadCheckedDropDownList, so any help will be appreciated.

Regards,

Mateusz

I create a BarSeries where the category is the sequence of integers 1, 2, 3, ...

then I change

MajorTickInterval = 10;

tick labels are drawn as 12 22 32 ...

Why not 10, 20, 30 ...?

If I handle a RadTreeNode in this way:

The second Exception is thrown.

The workaround is in the comment, if you call m_myNode2.TreeViewElement or m_myNode2.Nodes before, everything works fine,

anything that causes internally a call to "TreeViewElement" or "FindTreeView" (i digged a bit in the source code).

So this happens only on Nodes, without Childnodes and not for Rootnodes.

It's more a Bug-Report than a Question, but don't know where to Post ist.

If  the TreeView Property is the first Property called, on a RadTreeNode, it always has the value null.

I create chart as follows:

            var barModel = new BarSeries
            {
                ValueMember = "Model",
                CategoryMember = "N"
            };
            radChartViewGss.Series.Add(_barModel);
            var barWellModel = new BarSeries
            {
                ValueMember = "WellModel",
                CategoryMember = "N"
            };
            radChartViewGss.Series.Add(barWellModel);

...creating and filling a table (DataTable gssTable)

            radChartViewGss.DataSource = gssTable;

... and show table
            radGridViewGss.DataSource = gssTable;

Everything works great.

Then I want to change the data:
           radChartViewGss.DataSource = null;

           radGridViewGss.DataSource = null;

            gssTable.BeginLoadData();
            gssTable.Rows.Clear();

... filling a table (gssTable)

            gssTable.EndLoadData();
            gssTable.AcceptChanges();

During the data modification process, the radGridView is not updated, but radChartView constantly tries to update itself. As a result, everything works very slowly.

Why two similar component behave differently when data source disconnected?

I know how programmatically I can disable this behavior of the chart. But this should be done automatically!!! If there is no data source, the chart is not drawn

Hello,

Will I be able to sell my app developed using my Telerik DevCraft Ultimate License

(Complimentary Developer License - Student Edition)?

*Commercial Use

Hello,

I'm developing a new app using telerik radwizard, using the example found at

https://docs.telerik.com/devtools/wpf/controls/radwizard/features/pages

However, when i try to run my application, i get an empty window:

I don't know what I'm doing wrong, can someone help me?

Source code bellow: