Join Date and Time values into single DateTime value in C#

While working with dates sometimes we need to join Date and Time values into single DateTime value.We can implement this using the methods of the DateTime class.

To convert a string representation of a date time value to datetime datatype ParseExact method of DateTime type is used.
It returns a DateTime value for the passed string value which represents a DateTime.

To create a datetime value from the date and time values in different TextBoxes we follow the below steps

1.Read the string value in the first TextBox. This is the string value representing a date.

In .aspx page 
<asp:TextBox ID="txtDate" runat="server"></asp:TextBox>

In code behind
DateTime dateValue = txtDate.Text;

2.Convert the above string value to a DateTime value using the ParseExact() method.

DateTime dtDate =
DateTime.ParseExact(dateValue.Text, "yyyy-MM-dd",System.Globalization.CultureInfo.InvariantCulture);

3.Read the string value in the second TextBox. This is the string value representing time.

In aspx page
 <asp:TextBox ID="txtTime" runat="server"></asp:TextBox>

In codebehind
var timeValue = txtTime.Text;

4.Convert the above time value string to a DateTime value using the ParseExact() method.

var dtTime = DateTime.ParseExact(timeValue, "HH:mm:ss", System.Globalization.CultureInfo.InvariantCulture);

5.Finally combine the date and time components using a DateTime constructor.We pass the different date and time components
to this constructor.This logic we can  include in the button click event.

 protected void Button1_Click(object sender, EventArgs e)
 {
DateTime dtComplete= new DateTime(dtDate.Year, dtDate.Month, dtDate.Day,dtTime.Hour,dtTime.Minute,dtTime.Second);
 }

 

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