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Code Analyzer for C#

There is a newer version: 10.2.0.105762

Why is this an issue?
In Blazor, when a route parameter
constraint is applied, the value is automatically cast to the corresponding component parameter type. If the constraint type does not match the
component parameter type, it can lead to confusion and potential runtime errors due to unsuccessful casting. Therefore, it is crucial to ensure that
the types of route parameters and component parameters match to prevent such issues and maintain code clarity.
How to fix it
Ensure the component parameter type matches the route parameter constraint type.

  
    
    
  
  
    
      Constraint Type
      .NET Type
    
  
  
    
      bool
      bool
    
    
      datetime
      DateTime
    
    
      decimal
      decimal
    
    
      double
      double
    
    
      float
      float
    
    
      guid
      Guid
    
    
      int
      int
    
    
      long
      long
    
    
      string
      string
    
  

Code examples
Noncompliant code example
@page "/my-route/{Param:datetime}"

@code {
    [Parameter]
    public string Param { get; set; } // Noncompliant
}

Compliant solution
@page "/my-route/{Param:datetime}"

@code {
    [Parameter]
    public DateTime Param { get; set; } // Compliant
}

Resources
Documentation

   Microsoft Learn - Blazor routing and
  navigation - Route Constraints

Constraint Type	.NET Type
bool	bool
datetime	DateTime
decimal	decimal
double	double
float	float
guid	Guid
int	int
long	long
string	string