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Hello, I am sorry for posting this question as it may be find silly to all, but I am not getting the exact solution. The question is I have a Date time picker in my project, it comes after the 3 textboxes in the form, if there is no text is entered in the textbox and enter on submit, it gives a message(validation) that data to be entered, in the same way, if the date is not selected, it should proceed further. What is the code to do that, the code whcih worked for other textboxes and not working for dateimepicker control is:

if (dateInsert.Value.ToString() = string.Empty)
               MessageBox.Show("Please select date!");
[no name] 11-Sep-13 6:25am
At the very least you are missing an =. if (dateInsert.Value.ToString() == string.Empty)
Other than that, I would have no idea what "not working" means.
karthik reddy mereddy 11-Sep-13 6:36am
I am sorry for the typo, I am using if (dateInsert.Value.ToString() == string.Empty).
When the page is loading it is coming with the todays date in datetimepicker control. What requieremnt is, I should definitely click or change the date to previous on the datetimepicker control in order to submit.
[no name] 11-Sep-13 7:27am
Okay so set the date picker to the previous date. What is the problem there? What does that have to do with anything in your posting?
Love 2 code 11-Sep-13 6:25am
Hi, the out of the box DateTimePicker control does not allow null values, so you could google for a nullable DateTimePicker control.

Have a look here: DateTimePicker.Value[^] property, which gets or sets the date/time value assigned to the control.

If you would like to check if the value of DateTimePicker has a proper datetime value, please, use DateTime.TryParse[^] method.

DateTime dtValue = DateTime.Now();
bool bres = DateTime.TryParse(dateInsert.Value.ToString(), dtValue);

if (bres==true) 
//proper date
//unable to convert!

Parsing Date and Time Strings[^]
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsApplication12
    public partial class Form1 : Form
        public Form1()

        private void Form1_Load(object sender, EventArgs e)
            dateTimePicker1.CustomFormat = " ";
            dateTimePicker1.Format = DateTimePickerFormat.Custom;

        private void dateTimePicker1_MouseEnter(object sender, EventArgs e)
            dateTimePicker1.Format = DateTimePickerFormat.Short;
karthik reddy mereddy 12-Sep-13 2:25am
If we use dateTimePicker1.CustomFormat = " "; the control is becoming null and on submitting it is taking the default value. My requirement is it should give a error message and should not accept the Null value.
karthik reddy mereddy 12-Sep-13 2:26am
Actually, by using "blank space i the string" it is taking that space as value and displaying as null, but actually it is not becoming Null.
U mean to say every time user have to change the default date ?

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