Finding Entered Text is String or Numberic in C# by using Regex class

Finding Entered Text is String or Numberic in C# by using Regex class

//Here i am writing code for Searching company either by using company id or company name

protected void Page_Load(object sender, EventArgs e)

   {

        if (IsNumber(txtDISCompanyId.Text))

            {

                DataSet ds = ListMatchingCompanies("", "", "", txtDISCompanyId.Text);

                GetDIsCompanyInfo(ds);

            }

            else

            {

                DataSet ds = ListMatchingCompanies(txtDISCompanyId.Text,"","","");

                GetDIsCompanyInfo(ds);

            }

   }

//This function will return either true or false. If the given text is numeric it will return true. else it will return false(entered text is string)

 bool IsNumber(string text)

        {

            Regex regex = new Regex(@"^[-+]?[0-9]*\.?[0-9]+$");

            return regex.IsMatch(text);

        }

RamaSubbaReddy M