How do I assign a string value to ienumerable<string> datatype?

Question

1.00/5 (2 votes)

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Hi,

I have a

C#

RadzenDropDown

component and it's bind-Value should be set 'Zero' on page load.

C#

<RadzenDropDown AllowClear="true" AllowFiltering="true" FilterCaseSensitivity="FilterCaseSensitivity.CaseInsensitive"
                        @bind-Value=@productValue Multiple="true" Placeholder="Select" Data=@listProduct TextProperty="Name" ValueProperty="Code"/>

What I have tried:

C#

List<Product> listProduct = new List<Product>();
 IEnumerable<string> productValue = new string[] { };
 protected override async Task OnInitializedAsync()
    {
listProduct.Add(new Product{ Code = "0", Name = "All" });
listProduct.Add(new Product{ Code = "1", Name = "Product1" });
listProduct.Add(new Product{ Code = "2", Name = "Product2" });
listProduct.Add(new Product{ Code = "3", Name = "Product3" });
productValue  = ("0").Split(new string[] { "," }, StringSplitOptions.None);
}

How can I write

C#

productValue = "0"

instead of

C#

productValue = ("0").Split(new string[] { "," }, StringSplitOptions.None);

?

Posted 23-Jul-23 19:56pm

Rajesh Kumar 2013

Updated 24-Jul-23 7:34am

PIEBALDconsult

v2

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Member 15627495 24-Jul-23 13:38pm

IEnumerable<string> productValue = new string[]{"0"};

As it works by Vb .Net, it could help you.

1 solution

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OriginalGriff · Accepted Answer · 2023-07-23T20:37:00

FIrstly, this line is a bit ... overcomplicated:

C#

varname = ("0").Split(new string[] { "," }, StringSplitOptions.None);

You can get the same result with

C#

varname = "0".Split(",", StringSplitOptions.None);

or

C#

varname = "0".Split(',', StringSplitOptions.None);

or even

C#

varname = "0".Split(',');

In fact, with a fixed string of "0" to Split on commas, what you get as a result is always going to be an array of strings containing a single element: "0"
But this code isn't what you want at all if you want a string in varname:

C#

IEnumerable<string> varname = myString.Split(myDelimiter);

Because while a string is an IEnumerable, it's an IEnumerable<char> not an IEnumerable<string>
If you write this:

C#

foreach (var x in "hello world!")
   ...

Then the type of x inside the loop will be char.

So you need to think about exactly what you expect the code to do, because in it's current state, it doesn't make any real sense at all!