/// <summary>
/// Constructs a new instance of the <see cref="T:Wisej.Web.Ext.ChartJS.DataSetCollection"/> class.
/// </summary>
/// <param name="chart">The <see cref="T:Wisej.Web.Ext.ChartJS.ChartJS"/> that owns this collection.</param>
/// <param name="previous">The previous data sets to reload into this new collection, or null.</param>
internal DataSetCollection(ChartJS chart, DataSetCollection previous)
{
if (chart == null)
{
throw new ArgumentNullException("chart");
}
this.chart = chart;
// preserve the previous data sets.
if (previous != null)
{
foreach (var d in previous)
{
DataSet dataSet = CreateDataSet(d.Label);
dataSet.CopyFrom(d);
Add(dataSet);
}
}
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == typeof(string))
{
DataSetCollection dataSets = (DataSetCollection)value;
if (dataSets == null || dataSets.Count == 0)
{
return("0 Data Sets");
}
else if (dataSets.Count == 1)
{
return("1 Data Set");
}
else
{
return(dataSets.Count + " Data Sets");
}
}
return(base.ConvertTo(context, culture, value, destinationType));
}
private void ResetDataSets()
{
this._dataSets = null;
Update();
}
