using System; using System.Collections.Generic; namespace TryGetValueExample { class Program { static void Main(string[] args) { Dictionary<string, int> ages = new Dictionary<string, int> { {"Alice", 30}, {"Bob", 25} }; int age; if (ages.TryGetValue("Alice", out ...
{objectvalue=null;// Although TryGetValue handles missing keys,// it doesn't handle passing in a null// key. This example traps for that particular error, but// bubbles any other unknown exceptions back out to the// caller.try{if(builder.TryGetValue(key,outvalue)) { Console.WriteLine(...
{objectvalue=null;// Although TryGetValue handles missing keys,// it doesn't handle passing in a null// key. This example traps for that particular error, but// passes any other unknown exceptions back out to the// caller.try{if(builder.TryGetValue(key,outvalue)) { Console.WriteLine("...
(Nothing in Visual Basic)// key. This example traps for that particular error, but// throws any other unknown exceptions back out to the// caller.try{if(builder.TryGetValue(key,outvalue)) { Console.WriteLine("{0}='{1}'", key,value); }else{ Console.WriteLine("Unable to retrieve ...
This example traps for that particular error, but // passes any other unknown exceptions back out to the // caller. try { if (builder.TryGetValue(key, out value)) { Console.WriteLine("{0}='{1}'", key, value); } else { Console.WriteLine("Unable to retrieve value for '{0}'",...
using System; using System.Reflection; using System.Runtime.CompilerServices; public class Example { string Name; public Example(string name) { this.Name = name; } public override string ToString() { return this.Name; } } // Define a class to contain information about each Example instance....
trygetvalue 例句 释义: 全部 更多例句筛选 1. The example shows how to use the TryGetValue method to retrieve values. 此示例演示如何使用TryGetValue方法来检索值。 msdn2.microsoft.com© 2024 Microsoft 隐私声明和 Cookie 法律声明 广告 帮助 反馈...
If the key is not found, then thevalueparameter gets the appropriate default value for the typeTValue; for example, 0 (zero) for integer types,falsefor Boolean types, andnullfor reference types. Use theTryGetValuemethod if your code frequently attempts to access keys that are not in the ...
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The following example creates a customValidationRulenamedValidateDateAndPrice. 在方法中Validate,该示例使用TryGetValue方法和Items属性获取用户输入到窗体中的值。 然后,该示例将检查某个项目是否超过 100 美元,则至少 7 天可用。 此示例是类上较大示例的BindingGroup一部分 ...