IsDateTime C# ErrorProvider
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Introduction

In this sample-snippet the author shows how to check if an input-value is of type DateTime. The method is provided in a static class called TypeHelper. In the example, the class is used to show the occured error in a WinForms-ErrorProvider.

public static class TypeHelper
{
    /// <summary>
    /// Check if an input-value is of type DateTime
    /// </summary>
    /// <param name="value">input</param>
    /// <returns>bool</returns>
    public static bool IsDateTime(object value)
    {
        try
        {
            if (value == null)
                return false;

            DateTime dateTime = DateTime.Parse(value.ToString());
            return true;
        }
        catch (FormatException)
        {
            return false;
        }
    }
}

The TypeHelper is used to display the error like that:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void btnIsDateTime_Click(object sender, EventArgs e)
    {
        if (!TypeHelper.IsDateTime(textBox1.Text.Trim()))
            errorProvider1.SetError(textBox1, 
                "You did not enter a valid DateTime-type");
        else
            errorProvider1.SetError(textBox1, "");
    }
}

And this is how the result looks like:


Figure 1

It's an easy example but you can extend it with other methods like IsNumeric... Have fun!




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