abstract:本文實(shí)例講述了ASP.NET中Dictionary基本用法。分享給大家供大家參考,具體如下://Dictionary位于System.Collections.Generic命名空間之下 /* * 使用Dictionary之前必須引用System.Collections.Generic命名空間; * 使用Dictionary時(shí)必須聲明其鍵和值的數(shù)據(jù)類型(可
本文實(shí)例講述了ASP.NET中Dictionary基本用法。分享給大家供大家參考,具體如下:
//Dictionary位于System.Collections.Generic命名空間之下 /* * 使用Dictionary之前必須引用System.Collections.Generic命名空間; * 使用Dictionary時(shí)必須聲明其鍵和值的數(shù)據(jù)類型(可以為任意類型); */ //聲明實(shí)例化Dictionary為dic System.Collections.Generic.Dictionary<int, string> dic = new System.Collections.Generic.Dictionary<int, string>(); //為dic添加鍵和值 dic.Add(100, "quber100"); dic.Add(200, "quber200"); //檢查是否存在300這個(gè)鍵 if (!dic.ContainsKey(300)) { //新增加300(鍵)和對(duì)應(yīng)的quber300(值) dic.Add(300, "quber300"); } //移除dic鍵為300的項(xiàng) dic.Remove(300); //獲取dic鍵值對(duì)總數(shù) int dicCount = dic.Count; Response.Write("循環(huán)獲取dic中的鍵和值:<br/>"); //循環(huán)獲取dic中的鍵和值 foreach (KeyValuePair<int, string> keyDic in dic) { Response.Write("key:" + keyDic.Key + ",value:" + keyDic.Value + "<br/>"); } Response.Write("<hr/><br/>"); Response.Write("循環(huán)獲取dic中的鍵:<br/>"); //循環(huán)獲取dic中的鍵 Dictionary<int, string>.KeyCollection keyDics = dic.Keys; foreach (int iKey in keyDics) { Response.Write("key:" + iKey + "<br/>"); } Response.Write("<hr/><br/>"); Response.Write("另一種方法循環(huán)獲取dic中的鍵:<br/>"); //循環(huán)獲取dic中的鍵 foreach (int iKey in dic.Keys) { Response.Write("key:" + iKey + "<br/>"); } Response.Write("<hr/><br/>"); Response.Write("循環(huán)獲取dic中的值:<br/>"); //循環(huán)獲取dic中的值 Dictionary<int, string>.ValueCollection valueDics = dic.Values; foreach (string strValue in valueDics) { Response.Write("value:" + strValue + "<br/>"); } Response.Write("<hr/><br/>"); Response.Write("另一種方法循環(huán)獲取dic中的值:<br/>"); //循環(huán)獲取dic中的值 foreach (string strValue in dic.Values) { Response.Write("value:" + strValue + "<br/>"); } Response.Write("<hr/><br/>"); Response.Write("獲取dic中單個(gè)鍵和值:<br/>"); Response.Write("key:100,value:" + dic[100] + "<br/>"); Response.Write("<hr/><br/>"); Response.Write("檢查dic中是否存在鍵(100),并返回其值dicStr:<br/>"); //檢查dic中是否存在鍵(100),并返回其值dicStr string dicStr = string.Empty; if (dic.TryGetValue(100, out dicStr)) { Response.Write("OK"); } else { Response.Write("NO"); } Response.Write("<hr/><br/>");
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