Get class by string value in C#

Get class by string value in C#

In C#, you can get a class by its name using the Type.GetType() method. Here's an example of how to get a class by a string value in C#:

string className = "MyNamespace.MyClass"; Type classType = Type.GetType(className);

This code defines a string variable className containing the fully-qualified name of the class you want to get. The Type.GetType() method is then called with the className variable as its argument. The method returns a Type object that represents the requested class, which can be used to create instances of the class, get information about its properties and methods, and perform other reflection-related tasks.

Note that the Type.GetType() method returns null if the specified class is not found. Additionally, if the class you want to get is in a different assembly, you may need to provide the assembly-qualified name of the class instead of just its namespace and name. For example:

string className = "MyNamespace.MyClass, MyAssembly"; Type classType = Type.GetType(className);

In this example, the className variable contains the fully-qualified name of the class and the name of its assembly, separated by a comma. The Type.GetType() method is then called with the className variable as its argument, allowing the method to locate the class even if it is in a different assembly.

Examples

  1. Retrieve Class by Name in C#

    // Example code using System; public class MyClass { public void MyMethod() { Console.WriteLine("MyMethod called."); } } class Program { static void Main(string[] args) { string className = "MyClass"; Type type = Type.GetType(className); if (type != null) { dynamic instance = Activator.CreateInstance(type); instance.MyMethod(); } else { Console.WriteLine("Class not found."); } } }

    Description: This code demonstrates how to retrieve a class by its name in C# using reflection. It dynamically loads the class and invokes its method.

  2. Get Class Instance from String in C#

    // Example code using System; public class MyClass { public void MyMethod() { Console.WriteLine("MyMethod called."); } } class Program { static void Main(string[] args) { string className = "MyClass"; Type type = Type.GetType(className); if (type != null) { object instance = Activator.CreateInstance(type); var method = type.GetMethod("MyMethod"); method.Invoke(instance, null); } else { Console.WriteLine("Class not found."); } } }

    Description: This code snippet shows how to get a class instance from a string in C# using reflection. It creates an instance of the class and invokes its method dynamically.

  3. Instantiate Class by Name in C#

    // Example code using System; public class MyClass { public void MyMethod() { Console.WriteLine("MyMethod called."); } } class Program { static void Main(string[] args) { string className = "MyClass"; Type type = Type.GetType(className); if (type != null) { object instance = Activator.CreateInstance(type); // Use instance of the class } else { Console.WriteLine("Class not found."); } } }

    Description: This code illustrates how to instantiate a class by its name in C# using reflection. It creates an instance of the class dynamically.

  4. Get Class Object by String Name in C#

    // Example code using System; class Program { static void Main(string[] args) { string className = "Namespace.MyClass"; Type type = Type.GetType(className); if (type != null) { object instance = Activator.CreateInstance(type); // Use instance of the class } else { Console.WriteLine("Class not found."); } } }

    Description: This code snippet demonstrates how to get a class object by its string name in C# using reflection. It creates an instance of the class dynamically.

  5. Load Class by Name in C#

    // Example code using System; class Program { static void Main(string[] args) { string className = "Namespace.MyClass"; Type type = Type.GetType(className); if (type != null) { // Load class and use it } else { Console.WriteLine("Class not found."); } } }

    Description: This code showcases how to load a class by its name in C# using reflection. It checks if the class exists and then loads it dynamically.

  6. Create Object of Class by Name in C#

    // Example code using System; class Program { static void Main(string[] args) { string className = "Namespace.MyClass"; Type type = Type.GetType(className); if (type != null) { object instance = Activator.CreateInstance(type); // Use instance of the class } else { Console.WriteLine("Class not found."); } } }

    Description: This code provides an example of creating an object of a class by its name in C# using reflection. It dynamically instantiates the class.

  7. Get Class Type by Name in C#

    // Example code using System; class Program { static void Main(string[] args) { string className = "Namespace.MyClass"; Type type = Type.GetType(className); if (type != null) { // Use type of the class } else { Console.WriteLine("Class not found."); } } }

    Description: This code demonstrates how to get the type of a class by its name in C# using reflection. It retrieves the type of the class dynamically.

  8. Dynamically Create Class Instance in C#

    // Example code using System; class Program { static void Main(string[] args) { string className = "Namespace.MyClass"; Type type = Type.GetType(className); if (type != null) { object instance = Activator.CreateInstance(type); // Use instance of the class } else { Console.WriteLine("Class not found."); } } }

    Description: This code snippet shows how to dynamically create an instance of a class in C# using reflection. It creates an instance of the class by its name.

  9. Instantiate C# Class Dynamically

    // Example code using System; class Program { static void Main(string[] args) { string className = "Namespace.MyClass"; Type type = Type.GetType(className); if (type != null) { object instance = Activator.CreateInstance(type); // Use instance of the class } else { Console.WriteLine("Class not found."); } } }

    Description: This code showcases how to instantiate a C# class dynamically by its name using reflection. It creates an instance of the class at runtime.

  10. Invoke Method of Class by Name in C#

    // Example code using System; public class MyClass { public void MyMethod() { Console.WriteLine("MyMethod called."); } } class Program { static void Main(string[] args) { string className = "MyClass"; Type type = Type.GetType(className); if (type != null) { object instance = Activator.CreateInstance(type); var method = type.GetMethod("MyMethod"); method.Invoke(instance, null); } else { Console.WriteLine("Class not found."); } } }

    Description: This code exemplifies how to invoke a method of a class by its name in C# using reflection. It dynamically loads the class, retrieves the method, and invokes it.

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