Can't Convert Textbox.Text to DateTime

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I have this Code and When I convert textbox.text to DateTime it throw an exception
(String was not recognized as a valid DateTime).

ASP.NET

<asp:TextBox ID="TextBoxBirthDate" runat="server" CssClass="tb10"></asp:TextBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" 
                             ControlToValidate="TextBoxBirthDate" 
                             ErrorMessage="Please enter your Date of Birth" Display="Dynamic">*</asp:RequiredFieldValidator>
                          <asp:CalendarExtender ID="CalendarExtender1" runat="server" DefaultView="Years" 
                             FirstDayOfWeek="Saturday" Format="dd/MM/yyyy" 
                             TargetControlID="TextBoxBirthDate" EndDate="1997-12-31" 
                             StartDate="1980-01-01" SelectedDate="1994-01-01">
                         </asp:CalendarExtender>

please help

Posted 17-Apr-12 0:06am

kareem salem

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5 solutions

Solution 1

Your format is asking for a day / month / year format. You are giving it a selected date in the format year / day / month. Change your format to yyyy/dd/mm.

Posted 17-Apr-12 0:12am

DominicZA

v2

Comments

kareem salem 17-Apr-12 6:16am

thanks Dominic, but it's Arabian culture that day comes before month

Solution 3

The most obvious issue here is that you have this code:

HTML

asp:CalendarExtender ID="CalendarExtender1" runat="server" DefaultView="Years" 
  FirstDayOfWeek="Saturday" Format="dd/MM/yyyy" 
  TargetControlID="TextBoxBirthDate" EndDate="1997-12-31" 
  StartDate="1980-01-01" SelectedDate="1994-01-01"

Well, your EndDate, StartDate and SelectedDate aren't in the format dd/MM/yyyy. Change them to this:

HTML

EndDate="31/12/1997" StartDate="01/01/1980" SelectedDate="01/01/1994"

Posted 17-Apr-12 0:18am

Pete O'Hanlon

Comments

kareem salem 17-Apr-12 6:35am

thanks pete O'Hanlon I think I need fill
Convert.ToDateTime method with IformatProvider but I don't know how
Convert.TodDateTime(TextBoxBirthDate,[xxxxxxx]);

Solution 5

DateTime.ParseExact(TextBoxBirthDate.Text, "yyyy/MM/dd", CultureInfo.InvariantCulture);

why yyyy/MM/dd format always shows error

Posted 23-Aug-15 20:12pm

Member 11423044

Solution 2

Hi,

TextBox text may be in incorrect format for date. Try giving it in "mm/dd/yyyy" format.

Posted 17-Apr-12 0:17am

Deepak_Sharma_

Comments

[no name] 17-Apr-12 16:08pm

In this context, mm/dd/yyyy would mean minutes/days/year. MM is month.

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sjelen · Accepted Answer · 2012-04-17T05:24:00

Solution 4

Try using:

C#

DateTime.ParseExact(TextBoxBirthDate.Text, "dd/MM/yyyy", CultureInfo.InvariantCulture);

Posted 17-Apr-12 5:24am

sjelen

Comments

kareem salem 18-Apr-12 2:42am

thank you sjelen