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64 lines
1.8 KiB
64 lines
1.8 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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//namespace Utils.Datas
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namespace System.Collections.Generic
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{
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public static class DictionaryUtil
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{
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/// <summary>
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/// 将第二个参数中的数据合并到第一个参数中。【通过Key判断。如果已存在，则忽略】
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/// <para>Key不能为类</para>
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/// </summary>
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public static void Combine<T1, T2>(this IDictionary<T1, T2> a, IDictionary<T1, T2> b)
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{
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if (a == null)
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a = new Dictionary<T1, T2>();
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if (b == null || b.Count == 0)
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return;
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foreach (var item in b) {
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if (!a.Keys.Contains(item.Key))
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a.Add(item.Key, item.Value);
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}
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}
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/// <summary>
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/// 找出两个参数中，Key相同的项的Key
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/// <para>Key不能为类</para>
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/// </summary>
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public static List<T1> FindSameKey<T1, T2>(this IDictionary<T1, T2> a, IDictionary<T1, T2> b)
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{
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List<T1> result = new List<T1>();
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foreach (var item in a) {
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if (b.Keys.Contains(item.Key))
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result.Add(item.Key);
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}
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return result;
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}
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/// <summary>
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/// 从第一个参数中去掉第二个参数中的所有项后，剩余项的Key。只比较Key
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/// <para>Key不能为类</para>
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/// </summary>
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public static List<T1> SubKey<T1, T2>(this IDictionary<T1, T2> a, IDictionary<T1, T2> b)
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{
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List<T1> result = new List<T1>();
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foreach (var item in a) {
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if (!b.Keys.Contains(item.Key))
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result.Add(item.Key);
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}
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return result;
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}
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public static Dictionary<T1, string> ChangeValueToString<T1>(this IDictionary<T1, object> dic)
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{//TODO:添加测试
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Dictionary<T1, string> result = new Dictionary<T1, string>();
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foreach (var detail in dic) {
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result.Add(detail.Key, detail.Value == null ? string.Empty : detail.Value.ToString());
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}
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return result;
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}
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}
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}
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