How to check if the variable is a String

Question

I have a simple problem,

dtERP value = 2885,78,89,78A;

for (int i = 0; i < dtERP.Rows.Count; i++)
{
    for (int j = 0; j < dtERP.Columns.Count; j++)
    {
        object field = dtERP.Rows[j]["QTY"];
        if (field != int)
        {

        }
    }
}

How can I validate my field if the value is string?

Please only add relevant tags to your question. Also, your current code doesn't make sense (given the initial value of dtERP, it can't be a `DataTable`). What does "how can I validate my field if the value have a string character" mean? — ProgrammingLlama, Feb 13 '20 at 03:01
https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/is — TheGeneral, Feb 13 '20 at 03:05
uhm. something like ``if (Convert.ToInt32(field) != true) {error}`` — iMemew, Feb 13 '20 at 03:07

Salah Akbari · Accepted Answer · 2020-02-13T03:29:10.167

3

You can use the is operator. Something like this:

if(field is string)

edited Feb 13 '20 at 03:29

answered Feb 13 '20 at 03:02

Salah Akbari

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Do note that if the original value is `"7"`, it is still a string - a database column cannot store both strings and numbers. But this particular value may be *converted* to an int – Hans Keﬆing Feb 13 '20 at 10:57

score 0 · Answer 2 · edited Feb 13 '20 at 15:29

0

You can do a .GetType() on the variable/instance.

edited Feb 13 '20 at 15:29

Salah Akbari

39,330
10
79
109

answered Feb 13 '20 at 03:41

Djs75

5
2

How to check if the variable is a String

2 Answers2