Question

我了解DateTime和AddDays()命令。但是我需要在我的txtDateTime.Text文本框中输入日期，并在我的txtNights.Text中花费一些时间。仅仅因为我不知道如何将它们加在一起并在第三个texbox中显示它们，这里是我的所有代码......

public partial class Request : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        txtDateTime.Text = DateTime.Now.ToString("d");

        if (!IsPostBack)
        {
            Calendar1.Visible = false;
        }

        txtDateTime.Focus();

    }
    protected void TextBox1_TextChanged(object sender, EventArgs e)
    {

    }
    protected void imgCalendar_Click(object sender, ImageClickEventArgs e)
    {
        if (Calendar1.Visible)
        {
            Calendar1.Visible = false;
        }
        else
        {
            Calendar1.Visible = true;
        }    
    }
    protected void Calendar1_SelectionChanged(object sender, EventArgs e)
    {
        txtDateTime.Text = Calendar1.SelectedDate.ToShortDateString();
    }
    protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
    {

    }
    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        lblThank.Text = "Thank you for your request";

        double dblNights = 0;

//Validation
        //Validation of Nights
        try
        {
            dblNights = Convert.ToDouble(txtNights.Text);

            if (double.TryParse(txtNights.Text, out dblNights))
            {

            }
            else
            {
                string script = "alert(\"Number of Nights Must be between 1 and 14!\");";
            ScriptManager.RegisterStartupScript(this, GetType(),
                                  "ServerControlScript", script, true);
                txtNights.Focus();
            }
        }//End Try

        catch
        {
            string script = "alert(\"Number of Nights Must be an Integer!\");";
            ScriptManager.RegisterStartupScript(this, GetType(),
                                  "ServerControlScript", script, true);


            txtNights.Focus();
        }//End Catch



        //End Nights Validation
   //validation of Email/Name Fields
        Boolean blnErrors = false;

        if (txtName.Text == "")
        {
            string script = "alert(\"Name Field Is Required!\");";
            ScriptManager.RegisterStartupScript(this, GetType(),
                                  "ServerControlScript", script, true);

            txtName.Focus();
        }

        if (txtEmail.Text == "")
        {
            string script = "alert(\"Email Field Is Required!\");";
            ScriptManager.RegisterStartupScript(this, GetType(),
                                  "ServerControlScript", script, true);

            txtEmail.Focus();
        }

    //End Validation of Email/Name Fields
//End ALL Validation


  //Depparture Date

        DateTime arrivalDate = Calendar1.SelectedDate;

        DateTime departureDate = arrivalDate.AddDays(1);

        string formattedDate = departureDate.ToString("dd/MM/yy");

        formattedDate = txtDeparture.Text;





    }//End Submit
    protected void btnClear_Click(object sender, EventArgs e)
    {
        txtDateTime.Text = "";
        txtEmail.Text = "";
        txtName.Text = "";
        txtNights.Text = "";
        txtSpecial.Text = "";

        radKing.Checked = false;
        radStandard.Checked = false;
        radSuite.Checked = false;
        radBusiness.Checked = false;
        radDouble.Checked = false;
    }
    protected void txtDeparture_TextChanged(object sender, EventArgs e)
    {

        DateTime arrivalDate = Calendar1.SelectedDate;

        DateTime departureDate = arrivalDate.AddDays(1);

        string formattedDate = departureDate.ToString("dd/MM/yy");

        formattedDate = txtDeparture.Text;


    }
}

我需要将txtDateTime.Text中选择的日期与我txtNights.Text中输入的住宿天数进行比较，然后将这两个日期添加到第三个名为{{1}的框中}

如何使用txtDeparture.Text和DateTime？

进行此操作

Answer 1

我有点困惑，但我认为这就是你要找的东西？

DateTime startDate = DateTime.Parse(txtDateTime.Text);
int daysToSpend = int.Parse(txtNights.Text);
DateTime endDate = startDate.AddDays(daysToSpend);

Answer 2

您需要修改\\Departure Date方法

中的btnSubmit_Click(部分

目前您已编码添加1天。您需要更改以下行。

DateTime arrivalDate = Calendar1.SelectedDate;  
DateTime departureDate = arrivalDate.AddDays(1);    
string formattedDate = departureDate.ToString("dd/MM/yy");  
formattedDate = txtDeparture.Text;

以下

DateTime arrivalDate = Convert.ToDateTime(txtDateTime.Text);
DateTime departureDate = arrivalDate.AddDays(Convert.ToInt32(txtNights.Text));   
string formattedDate = departureDate.ToString("dd/MM/yy");  
txtDeparture.Text = formattedDate;

或者用更少的代码来做。

DateTime arrivalDate = Convert.ToDateTime(txtDateTime.Text);
txtDeparture.Text = arrivalDate.AddDays(Convert.ToInt32(txtNights.Text)).ToString("dd/MM/yy");

如何将日期添加到日期？

2 个答案: