Good evening,



I have an user custom control that a textbox, a regular expression validator for the text in the textbox to be an integer. The problem is, when I try to convert the number form the textbox it gives me an error: "Exception Details: System.FormatException: Input string was not in a correct format."



My control:


<tr>
    <td align="right"><asp:Label ID="lblName" runat="server" Text="Label"></asp:Label></td>
    <td align="left"><asp:TextBox ID="value" runat="server"></asp:TextBox>
    <asp:RequiredFieldValidator ControlToValidate="value" ID="reqValue" runat="server" ValidationGroup="ad" ErrorMessage="You must input a numeric value" Text="*" CssClass="validation"></asp:RequiredFieldValidator>
       <asp:RegularExpressionValidator ControlToValidate="value" ValidationExpression="^[0-9]*$" ValidationGroup="ad" ID="regValue" runat="server" ErrorMessage="You must input a numeric value"></asp:RegularExpressionValidator>


    </td>
</tr>


My code-behind:


public void Insert(int idad)
{
     bd.InsertValueValue(idad, Convert.ToInt16(value.Text), idtp);
}


 And the complete error:

[FormatException: Input string was not in a correct format.]
   System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +2755599
   System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +112
   System.Int16.Parse(String s, NumberStyles style, NumberFormatInfo info) +25
   System.Convert.ToInt16(String value) +68



Any suggestion is appreciated :) (the problem is not in the name of the TextBox, I've tried with other names)



Thanks in advance

First, be as it may, you shouldn't use keywords as object names, it needlessly makes things confusing for people that look at your code other than you.

The Format exception can be thrown if the value you are passing in == string.Empty or, obviously, it is not a value that can be converted to an Int.

Have you steped through the code? Have you looked at the value of idad as your app runs?

Also, do you realize that by calling Convert.ToInt16 you are really converting the value to a short data type and not an integer?

hth.

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