学用 ASP.Net 之 System.Collections.Specialized.CollectionsUtil 类

通过 CollectionsUtil 创建或包装的 "键/值对" 类(实现 IDictionary 的), 可以忽略 Key 的大小写.

---

主要成员:

---

/* 静态方法 */
CollectionsUtil.CreateCaseInsensitiveHashtable();  //建立或包装 Hashtable 等, 可初始化容量
CollectionsUtil.CreateCaseInsensitiveSortedList(); //建立有序的哈希表 SortedList

---

创建忽略大小写的 Hashtable:

---

protected void Button1_Click(object sender, EventArgs e)
{Hashtable hash = CollectionsUtil.CreateCaseInsensitiveHashtable(); //这就建立了一个忽略大小写的哈希表hash["KEY1"] = 123;int n = (int)hash["key1"];    //123TextBox1.Text = n.ToString();try { hash.Add("Key1", 456); }catch (Exception err) { Response.Write(err.Message); } //已添加项。字典中的关键字:“KEY1”所添加的关键字:“Key1” 
}

---

创建忽略大小写的 SortedList:

---

protected void Button1_Click(object sender, EventArgs e)
{SortedList sl = CollectionsUtil.CreateCaseInsensitiveSortedList(); //这就建立了一个忽略大小写的 SortedListsl["KEY1"] = 123;TextBox1.Text = sl["key1"].ToString(); //123try { sl.Add("Key1", 456); }catch (Exception err) { Response.Write(err.Message); } //已添加项。字典中的关键字:“KEY1”所添加的关键字:“Key1” 
}

---

包装一个 Hashtable 为忽略大小写:

---

protected void Button1_Click(object sender, EventArgs e)
{Hashtable hash = new Hashtable();hash.Add("KEY1", "aaa");hash.Add("KEY2", "bbb");hash.Add("KEY3", "ccc");bool b1 = hash.Contains("KEY1"); //Truebool b2 = hash.Contains("key1"); //Falsehash = CollectionsUtil.CreateCaseInsensitiveHashtable(hash);bool b3 = hash.Contains("key1"); //TrueTextBox1.Text = string.Concat(b1, "
", b2, "
", b3);
}

---