I have one enum like below
public enum Colors
{
red,
blue,
green,
yellow
}
I want to use it switch case
public void ColorInfo(string colorName)
{
switch (colorName)
{
// i need a checking like (colorname=="red")
case Colors.red:
Console.log("red color");
break;
}
}
I am getting following error
Cannot implicitly convert type 'Color' to string
Can anyone help on this ..
Your best bet in my opinion is to try to parse the string value you get as an input as a Colors value, then you can do the switch based on the enum only. You can do so by using the Enum.TryParse<TEnum> function:
public void ColorInfo(string colorName)
{
Colors tryParseResult;
if (Enum.TryParse<Colors>(colorName, out tryParseResult))
{
// the string value could be parsed into a valid Colors value
switch (tryParseResult)
{
// i need a checking like (colorname=="red")
case Colors.red:
Console.log("red color");
break;
}
}
else
{
// the string value you got is not a valid enum value
// handle as needed
}
}
You can't compare an enum to a string as they are different types.
If you want to compare a string to an enum description, then you need to convert it a string first:
public void ColorInfo(string colorName)
{
if (Colors.red.ToString() == colorName)
Debug.Print("red color");
}
You can't use a switch statement to do the string conversion as each case must be a constant and Colors.red.ToString() is not.
An alternative is to convert the string to an enum first and then a switch statement to compare.
public void ColorInfo(string colorName)
{
try
{
Colors color = (Colors)Enum.Parse(typeof(Colors), colorName);
switch (color)
{
case Colors.red:
Debug.Print("red color");
break;
}
}
catch(ArgumentException ex)
{
Debug.Print("Unknown color");
}
}
Enum.Parse function will throw an exception is the value colorName can't be parsed into a Colors.
try/catch.
switch ((Colors)Enum.Parse(typeof(Colors), colorName))