42 lines
1.2 KiB
C#
42 lines
1.2 KiB
C#
using System.Collections.Generic;
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using System.Linq;
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using System.Windows.Media;
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using HandyControl.Controls;
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namespace HandyControl.Tools
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{
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/// <summary>
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/// 该类可以为可视化元素提供单开的功能
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/// </summary>
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public class SingleOpenHelper
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{
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private static readonly Dictionary<string, ISingleOpen> OpenDic = new Dictionary<string, ISingleOpen>();
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/// <summary>
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/// 根据指定的类型创建实例
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <returns></returns>
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public static T CreateControl<T>() where T : Visual, ISingleOpen, new()
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{
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var typeStr = typeof(T).FullName;
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if (string.IsNullOrEmpty(typeStr)) return default(T);
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var temp = new T();
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if (!OpenDic.Keys.Contains(typeStr))
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{
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OpenDic.Add(typeStr, temp);
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return temp;
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}
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var currentCtl = OpenDic[typeStr];
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if (currentCtl.CanDispose)
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{
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currentCtl.Dispose();
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OpenDic[typeStr] = temp;
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return temp;
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}
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return default(T);
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}
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}
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} |