How to add days to date automatically when select new date

Question

How to add date automatically when select new date ?? I have Dropdown list contains 2 items (ATMCIT)  textbox1 is (date) and textbox2 is also (date) if select date in textbox1 in text_change you must display date in textboxt2 automatically +30days if selected item from droplist is = ATM for example if i selected date in textbox1 is (01/01/2016) should display date automatically in textbox2 (30/01/2016) if date in textbox1= 26/01/2016 label1 display color is yellow if date in textbox1= 30/01/2016 label1 display color is Red if date in textbox1= 01/01/2016 label1 display color Green if select date in textbox1 in text_change you must display date in textboxt2 automatically +35days if selected item from droplist1 is = CIT for example if i selected date in textbox1 is (01/01/2016) should display date automatically in textbox2 (30/01/2016) if date in textbox1= 30/01/2016 label1 display color is yellow if date in textbox1= 35/01/2016 label1 display color is Red if date in textbox1= 01/01/2016 label1 display color Green protected void TextBox5_TextChanged(object sender EventArgs e) { // How to add days to current date in date in other text TextBox6.Text = TextBox5.Text; DateTime dt = DateTime.Now.AddDays(30); dt.AddDays(-1).ToString(dd/MM/yyyy); TextBox6.Text = dt.ToShortDateString(); Label1.Text = (Team Should Be Changed In: + dt.AddDays(0).ToShortDateString()); } } } please help me

Abdalla Elawad · Answer

Thank you to all members who have contributed to the solution

Abdalla Elawad · Answer

This is solution protected void DropDownList1_SelectedIndexChanged(object sender EventArgs e) { if (DropDownList1.SelectedItem.Text == ATM) { TextBox6.Text = TextBox5.Text; DateTime dt = DateTime.Now.AddDays(30); dt.AddDays(-1).ToString(dd/MM/yyyy); TextBox6.Text = dt.ToShortDateString(); Label2.BackColor = Color.Green; Label1.Text = (Team Should Be Changed In: + dt.AddDays(3).ToShortDateString()); } else if (DropDownList1.SelectedItem.Text == CIT) { TextBox6.Text = TextBox5.Text; DateTime dt = DateTime.Now.AddDays(35); dt.AddDays(-1).ToString(dd/MM/yyyy); TextBox6.Text = dt.ToShortDateString(); Label2.BackColor = Color.Green; Label1.Text = (Team Should Be Changed In: + dt.AddDays(3).ToShortDateString()); } }

theLizard · Answer

{ textBox2.Text = (date2 = date1).AddDays(30).ToString(dd/MM/yyyy); } private void comboBox1_SelectedIndexChanged(object sender EventArgs e) { if (comboBox1.SelectedIndex == 1) { date1 = DateTime.Now; textBox1.Text = date1.ToString(dd/MM/yyyy); }

Abdalla Elawad · Answer

Input string was not in a correct format

Abdalla Elawad · Answer

Imtiyaz Ansari · Answer

Hello Elaward try this... DateTime endDate = Convert.ToDateTime(this.txtStartDate.Text); Int64 addedDays = Convert.ToInt64(15);//change to the value as your requrement endDate=endDate.AddDays(addedDays); DateTime end = endDate; this.txtEndDate.Text = end.ToShortDateString();

Abdalla Elawad · Answer

hi Mr.Manas Briefly : i want add days to date not current date  i mean that if user selected 1/1/2016 system added 15 days becomes 16/1/2016 if selected 3/2/2016 becomes 18/2/2016 thanx to help

Manas Mohapatra · Answer

Please provide the detail info when you say code not run..

Abdalla Elawad · Answer

your code not run string tempDate = 19/04/2016; if (tempDate != string.Empty) { DateTime dtObj1 = DateTime.ParseExact(tempDate dd/MM/yyyy CultureInfo.InvariantCulture).AddDays(30); }

Manas Mohapatra · Answer

Try with below code: string tempDate = 19/04/2016; if (tempDate != string.Empty) { DateTime dtObj1 = DateTime.ParseExact(tempDate dd/MM/yyyy CultureInfo.InvariantCulture).AddDays(30); }

Abdalla Elawad · Answer

This is result of the first code but add days to current days only but i need to add when use select new date

Manas Mohapatra · Answer

What is the value you are getting from Date textbox??

Abdalla Elawad · Answer

The run code is add days to current date only but i need when user select new date must be add days but not add to current date and another problem date connected with selected item from dropdwonlist1 when user select ATM add 30 days on Rc.Date . and 35 in label1 the color change according to date

Manas Mohapatra · Answer

Yes you implemented the logic. So where is problem now?