switch case in ASP.NET

The "switch" statement in ASP.NET (as well as in other programming languages) provides a concise and structured way to execute different code blocks based on the value of a given expression. It simplifies complex conditional logic by allowing for multiple comparisons against a single expression.

switch (expression) { case value1: // Code to be executed if expression equals value1 break; case value2: // Code to be executed if expression equals value2 break; case value3: // Code to be executed if expression equals value3 break; // additional cases... default: // Code to be executed if expression does not match any case break; }

Explanation of each part of the "switch" statement

  1. expression: It represents the value or variable to be evaluated against the different cases. The expression should evaluate to a value of a type that can be compared.
  2. case: It defines the different possible values that the expression may match. Each case specifies a particular value or a range of values.
  3. code block: It contains the code to be executed if the expression matches the corresponding case. The code block for each case is executed sequentially until a break statement is encountered, which causes the switch statement to exit.
  4. default: It is an optional case that is executed when none of the other cases match the expression. It acts as a fallback option.

Now, let's consider an example to illustrate the usage of a "switch" statement in ASP.NET:

string color = "Red"; switch (color) { case "Red": Console.WriteLine("Selected color is Red"); break; case "Green": Console.WriteLine("Selected color is Green"); break; case "Blue": Console.WriteLine("Selected color is Blue"); break; default: Console.WriteLine("Selected color is not recognized"); break; }

In this example, the "switch" statement evaluates the value of the "color" variable. Based on the value, it executes the code block corresponding to the matching case. In this case, since color is "Red," the code block under the "Red" case is executed, resulting in the message "Selected color is Red" being printed to the console.

Selected color is Red

As shown in the example, the "switch" statement provides a more streamlined and readable way to handle multiple cases based on the value of an expression. It allows for efficient branching and execution of code blocks based on different possible values.


The "switch" statement is commonly used in ASP.NET when there are multiple possible conditions to be evaluated against a single expression. It simplifies complex decision-making and improves code organization and readability.