104 lines
4.0 KiB
C#
104 lines
4.0 KiB
C#
//-------------------------------------------------------------
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// <copyright company=’Microsoft Corporation’>
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// Copyright © Microsoft Corporation. All Rights Reserved.
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// </copyright>
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//-------------------------------------------------------------
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// @owner=alexgor, deliant
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//=================================================================
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// File: MapAreaCoordinatesConverter.cs
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//
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// Namespace: System.Web.UI.DataVisualization.Charting
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//
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// Classes: MapAreaCoordinatesConverter
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//
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// Purpose: Design-time converter for map area coordinates
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//
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// Reviewed: AG - August 7, 2002
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//
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//===================================================================
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using System.ComponentModel;
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using System.Globalization;
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namespace System.Web.UI.DataVisualization.Charting
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{
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/// <summary>
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/// Converter for the array of map area coordinates
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/// </summary>
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internal class MapAreaCoordinatesConverter : ArrayConverter
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{
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/// <summary>
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/// Overrides the CanConvertFrom method of TypeConverter.
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/// The ITypeDescriptorContext interface provides the context for the
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/// conversion. Typically this interface is used at design time to
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/// provide information about the design-time container.
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/// </summary>
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/// <param name="context">Descriptor context.</param>
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/// <param name="sourceType">Convertion source type.</param>
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/// <returns>Indicates if convertion is possible.</returns>
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public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
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{
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if (sourceType == typeof(string))
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{
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return true;
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}
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return base.CanConvertFrom(context, sourceType);
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}
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/// <summary>
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/// Overrides the ConvertFrom method of TypeConverter.
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/// Convert from comma separated values in the string.
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/// </summary>
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/// <param name="context">Descriptor context.</param>
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/// <param name="culture">Culture information.</param>
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/// <param name="value">Value to convert from.</param>
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/// <returns>Indicates if convertion is possible.</returns>
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public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
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{
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// Can convert from string where each array element is separated by comma
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string stringValue = value as string;
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if (stringValue != null)
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{
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string[] values = stringValue.Split(new char[] { ',' });
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float[] array = new float[values.Length];
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for (int index = 0; index < values.Length; index++)
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{
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array[index] = float.Parse(values[index], System.Globalization.CultureInfo.CurrentCulture);
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}
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return array;
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}
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// Call base class
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return base.ConvertFrom(context, culture, value);
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}
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/// <summary>
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/// Overrides the ConvertTo method of TypeConverter.
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/// Convert coordinates array to comma separated values in string.
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/// </summary>
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/// <param name="context">Descriptor context.</param>
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/// <param name="culture">Culture information.</param>
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/// <param name="value">Value to convert.</param>
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/// <param name="destinationType">Convertion destination type.</param>
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/// <returns>Converted object.</returns>
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public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
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{
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if (destinationType == typeof(string))
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{
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float[] array = (float[])value;
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string result = "";
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foreach (float d in array)
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{
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result += d.ToString(System.Globalization.CultureInfo.CurrentCulture) + ",";
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}
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return result.TrimEnd(',');
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}
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return base.ConvertTo(context, culture, value, destinationType);
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}
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}
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}
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