Hyperlink Click

[Saif]

Hi,

Is it possible that if user click the hyperlink a form will be open?
Thanks.

[Dimitar]

Hi Saif,

Thank you for writing.

Please note that the main purpose of this functionality is to display a hyperlink. Nevertheless you can intercept a link click and execute any code you want. To achieve this you can subscribe to the MouseDown event of the ContentElement and check if the mouse is over a link:

void ContentElement_MouseDown(object sender, MouseEventArgs e)
{
    FieldInfo pi = this.radDesktopAlert1.Popup.AlertElement.ContentElement.GetType().GetField("textPrimitiveImpl", BindingFlags.Instance | BindingFlags.SetProperty |BindingFlags.NonPublic);
    TextPrimitiveHtmlImpl text = (TextPrimitiveHtmlImpl)pi.GetValue(this.radDesktopAlert1.Popup.AlertElement.ContentElement);

    FormattedTextBlock textBlock = text.TextBlock;
    FormattedText clickedLink = IsMouseOverBlock(textBlock, e);

    if (clickedLink != null)
    {
        MessageBox.Show(clickedLink.Text + " pressed");
        //here you can execute any code you want
    }
}

private FormattedText IsMouseOverBlock(FormattedTextBlock textBlock, MouseEventArgs e)
{
    Point elementAtPoint = this.radDesktopAlert1.Popup.AlertElement.ContentElement.PointFromControl(e.Location);
    int linesCount = textBlock.Lines.Count;
    for (int i = 0; i < linesCount; ++i)
    {
        TextLine textLine = textBlock.Lines[i];
        int textLineCount = textLine.List.Count;
        for (int j = 0; j < textLineCount; ++j)
        {
            FormattedText formattedText = textLine.List[j];
            if (!string.IsNullOrEmpty(formattedText.Link) && formattedText.DrawingRectangle.Contains(elementAtPoint))
            {
                return formattedText;//found link under mouse
            }
        }
    }

    return null;//not found
}

The subscription to the event can be made as follows:

this.radDesktopAlert1.Popup.AlertElement.ContentElement.MouseDown += ContentElement_MouseDown;

Please let me know if there is something else I can help you with. 

 

Regards,
Dimitar
Telerik

 

 

[Saif]

Hi Dimitar

Thanks a lot on this one.
It really help me a lot.

[Saif]

Hi

I'm having exception error on TextPrimitiveHtmlImpl

FieldInfo pi = this.radDesktopAlert1.Popup.AlertElement.ContentElement.GetType().GetField("textPrimitiveImpl", BindingFlags.Instance | BindingFlags.SetProperty |BindingFlags.NonPublic);

pi always null

TextPrimitiveHtmlImpl text = (TextPrimitiveHtmlImpl)pi.GetValue(this.desktopAlert.Popup.AlertElement.ContentElement);

NullReferenceException was unhandled

[Saif]

Sorry for double post

typographical error on radDesktopAlert1, im using desktioAlert

I'm trying to edit the post to change the control name.

[Dimitar]

Hi Saif,

Thank you for writing back.

We have exposed a property for this and now you can access the text block without using a reflection:

void ContentElement_MouseDown(object sender, MouseEventArgs e)
{
    FormattedTextBlock textBlock = this.radDesktopAlert1.Popup.AlertElement.ContentElement.TextBlock;
    FormattedText clickedLink = IsMouseOverBlock(textBlock, e);

    if (clickedLink != null)
    {
        MessageBox.Show(clickedLink.Text + " pressed");
        //here you can execute any code you want
    }
}

I hope this information helps. 

Regards,
Dimitar
Telerik

 

 

[Saif]

Hi again.

Can you help me on converting this syntax into VB.Net.
I'm having problem with the adding of the event MouseDown.
Thanks.

[Saif]

I got it now.

AddHandler Me.RadDesktopAlert1.Popup.AlertElement.ContentElement.MouseDown, AddressOf ContentElement_MouseDown

Thanks.

[Dimitar]

Hi Saif,

Thank you for writing back.

Indeed I forgot to add the event subscription code. Nevertheless I am glad that you have found the solution yourself. 

Do not hesitate to contact us if you have other questions.

 

Regards,
Dimitar
Telerik

 

 

[VLADISLAV]

Using this solution and getting exception "An unhandled exception of type 'System.NullReferenceException' occurred in Telerik.WinControls.dll" After click on the link in alert window.

[Dimitar]

Hello Viktor,

Thank you for writing.

You should change the MouseDown event as follows:

void ContentElement_MouseDown(object sender, MouseEventArgs e)
{

    FieldInfo pi = (LightVisualElement).GetField("textPrimitiveImpl", BindingFlags.Instance | BindingFlags.NonPublic);
    TextPrimitiveHtmlImpl text = (TextPrimitiveHtmlImpl)pi.GetValue(this.radDesktopAlert1.Popup.AlertElement.ContentElement);

    FormattedTextBlock textBlock = text.TextBlock;
    FormattedText clickedLink = IsMouseOverBlock(textBlock, e);

    if (clickedLink != null)
    {
        MessageBox.Show(clickedLink.Text + " pressed");
        //here you can execute any code you want
    }
}

I hope this helps.

Regards,
Dimitar
Telerik

[VLADISLAV]

Vladislav

[VLADISLAV]

base.Dispose(disposing); here this exception throws still.

[Dimitar]

Hi Vladislav,

Thank you for writing back.

I just tested this and there is no exception on my side. This is why I have attached my test project. Could you please check it and let me know how it differs from your real setup? 

I am looking forward to your reply.

Regards,
Dimitar
Telerik

[VLADISLAV]

Thanks alot , all the problem was in format i thought al i need just link but u also need this thingy "<html><a href=\"#\">link</a></html>" .After adding tags everything warks well.