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Hyperlink Click

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DesktopAlert
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Saif
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Saif asked on 26 Jun 2014, 12:15 PM
Hi,

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

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Dimitar
Telerik team
answered on 01 Jul 2014, 10:03 AM
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
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Saif
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answered on 02 Jul 2014, 09:10 AM
Hi Dimitar

Thanks a lot on this one.
It really help me a lot.
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Saif
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answered on 02 Nov 2014, 09:47 AM
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
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Saif
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answered on 02 Nov 2014, 09:49 AM
Sorry for double post

typographical error on radDesktopAlert1, im using desktioAlert

I'm trying to edit the post to change the control name.
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Dimitar
Telerik team
answered on 05 Nov 2014, 03:17 PM
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
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Saif
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answered on 03 Feb 2015, 07:23 AM
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.
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Saif
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answered on 03 Feb 2015, 07:59 AM
I got it now.

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

Thanks.
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Dimitar
Telerik team
answered on 05 Feb 2015, 08:22 AM
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
 

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VLADISLAV
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answered on 12 Nov 2015, 09:49 AM
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.
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Dimitar
Telerik team
answered on 12 Nov 2015, 10:45 AM
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
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VLADISLAV
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answered on 12 Nov 2015, 10:50 AM
Vladislav
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VLADISLAV
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answered on 12 Nov 2015, 10:52 AM
base.Dispose(disposing); here this exception throws still.
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Dimitar
Telerik team
answered on 12 Nov 2015, 11:19 AM
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
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VLADISLAV
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answered on 12 Nov 2015, 11:32 AM
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.
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DesktopAlert
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Saif
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Dimitar
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Saif
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VLADISLAV
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