// Override the DataBindControl to set property values in
// the DataBindingCollection at design time.
public override void DataBindControl(IDesignerHost designerHost,
Control control)
{
DataBindingCollection bindings =
((IDataBindingsAccessor)control).DataBindings;
DataBinding imageBinding = bindings["ImageUrl"];
// If Text is empty, supply a default value.
if (!(imageBinding == null))
{
CustomHyperLink hype = (CustomHyperLink)control;
hype.ImageUrl = "Image URL.";
}
// Call the base method to bind the control.
base.DataBindControl(designerHost, control);
} // DataBindControl
// Override the GetDesignTimeHtml to set the CustomHyperLink Text
// property so that it displays at design time.
public override string GetDesignTimeHtml()
{
CustomHyperLink hype = (CustomHyperLink)Component;
string designTimeMarkup = null;
// Save the original Text and note if it is empty.
string text = hype.Text;
bool noText = (text.Trim().Length == 0);
try
{
// If the Text is empty, supply a default value.
if (noText)
{
hype.Text = "Click here.";
}
// Call the base method to generate the markup.
designTimeMarkup = base.GetDesignTimeHtml();
}
catch (Exception ex)
{
// If an error occurs, generate the markup for an error message.
designTimeMarkup = GetErrorDesignTimeHtml(ex);
}
finally
{
// Restore the original value of the Text, if necessary.
if (noText)
{
hype.Text = text;
}
}
// If the markup is empty, generate the markup for a placeholder.
if (designTimeMarkup == null || designTimeMarkup.Length == 0)
{
designTimeMarkup = GetEmptyDesignTimeHtml();
}
return(designTimeMarkup);
} // GetDesignTimeHtml
