Mohammad Fawaz

Check If The Input Is Numaric Or Not

To check if the input from text box is numaric or not, can we use the following idea:

1- In .aspx page, create TextBox control, and rename it to txtInput.
2- Create Label control, and rename it to lblResult.
3- Create Button control, and rename it to btnCheck.
4- In code behind, write the following code:

    protected void Page_Load(object sender, EventArgs e)
    {
        if (IsNumeric(txtInput.Text, IsNumericType.Integer))
        {
            lblResult.Text = "The Input Is Numeric";
        }
        else
        {
            lblResult.Text = "The Input Is Not Numeric";
        }
    }








    public enum IsNumericType : int
    {
        Integer = 0,
        Decimal = 1,
        Double = 2,
        Int64 = 3,
        Byte = 4,
        Float = 5
    }








    public static bool IsNumeric(string Input, IsNumericType NumericType)
    {
        try
        {
            switch (NumericType)
            {
                case IsNumericType.Byte:
                    byte ByteResult = byte.Parse(Input);
                    return true;
                case IsNumericType.Decimal:
                    decimal DecResult = decimal.Parse(Input);
                    return true;
                case IsNumericType.Double:
                    double DblResult = double.Parse(Input);
                    return true;
                case IsNumericType.Float:
                    float FltResult = float.Parse(Input);
                    return true;
                case IsNumericType.Int64:
                    Int64 I64Result = Int64.Parse(Input);
                    return true;
                case IsNumericType.Integer:
                    int intResult = int.Parse(Input);
                    return true;
                default:
                    return false;
            }
        }
        catch { return false; }
    }

5- Test it.

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مرسلة بواسطة Mohammad Fawaz في 22:23

التسميات: ASP.NET, C#