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Razor C# Logic

Conditional logic in Razor allows you to control the flow of your server-side code based on certain conditions. Razor supports all standard C# conditional statements, such as if, else if, else, and the ternary operator.

Key Topics

If-Else Statements

Example

@{
    int age = 20;
    if (age >= 18)
    {
        <p>You are eligible to vote.</p>
    }
    else
    {
        <p>You are not eligible to vote.</p>
    }
}

Explanation: This example uses an if-else statement to check a condition (age eligibility) and display a message accordingly.

Ternary Operator

Example

@{
    bool isMember = true;
    string message = isMember ? "Welcome, member!" : "Please sign up.";
}

<p>@message</p>

Explanation: The ternary operator is a concise way to perform conditional logic. This example checks membership status and assigns a message accordingly.

Switch Statement

Example

@{
    string day = "Monday";
    switch (day)
    {
        case "Monday":
            <p>Start of the workweek.</p>
            break;
        case "Friday":
            <p>End of the workweek.</p>
            break;
        default:
            <p>It’s a regular day.</p>
            break;
    }
}

Explanation: This example demonstrates using a switch statement to handle multiple cases based on the value of a variable.

Key Takeaways

  • Conditional logic helps control the flow of your Razor code dynamically.
  • Use if-else for straightforward conditions and the ternary operator for concise logic.
  • The switch statement is useful for handling multiple predefined cases.
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