How Can Reflection Be Used to Assign Default Values to Properties in C#?-C++-php.cn

How Can Reflection Be Used to Assign Default Values to Properties in C#?

Patricia Arquette

Release： 2025-01-26 09:46:12

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How Can Reflection Be Used to Assign Default Values to Properties in C#?

Use the reflection to assign the default value of the C#attribute

In object -oriented programming, the attribute is often required to be initialized to the default value, especially during the process of serialization and desertification. Although the Switch statement can be used to set the default value according to the type, the more effective method is to use reflection, which provides a programming solution.

Solution

The default value of the attribute with reflection is assigned to the attribute. Two situations need to be considered: value type and reference type.

Value type

For value type (save actual data), you can use the method. This method creates a new example of specified value type, which effectively initializes it into the default value.

Quote type Activator.CreateInstance

<code class="language-csharp">object value = Activator.CreateInstance(type);</code>

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In contrast to the value type, the reference type only saves the reference to another object. In this case, setting the attribute to NULL is the appropriate way to indicate its default value.

Found implementation

A combination of value type and reference type method can define a generic method to provide a unified way to obtain the default value.

<code class="language-csharp">object reference = null;</code>

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Note: In the newer .NET version (such as .NET Standard), should be written as

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