Go Premium for a chance to win a PS4. Enter to Win

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 495
  • Last Modified:

using c# to manipulate the look of the calendar object

Hi,

I am trying to get a calendar to display a different background for dates that have already passed.
I'm trying to use the dayrendered function,  getting the datetimenow and seeing if the date in the calendar cell is lesser than this date and if it is applying a different background colour to it.

My attempted code is as follows but I get the error:

CS0019: Operator '>' cannot be applied to operands of type 'int' and 'string'  

for the line : if (dblDay > e.Cell.Text)

So can I not do the comparing of the e.cell.text and todays day in this way or have i defined one of the variables incorrectly?

Many Thanks

protected void Page_Load(object sender, EventArgs e)
    {
        hidden.Visible = false;
 
        if (!IsPostBack)
        {
            OpenConnection();
 
            SqlCommand command = new SqlCommand("exec usp_GetValidMonths", conn);
 
            SqlDataReader reader = command.ExecuteReader();
 
            ArrayList yearList = new ArrayList();
 
            while (reader.Read())
            {
                string[] monthYear = SplitMonthYear(reader["month"].ToString());
 
                if (!yearList.Contains(monthYear[1]))
                    yearList.Add(monthYear[1]);
            }
 
            yearList.Sort();
 
            for (int i = 0; i < yearList.Count; i++)
            {
                ListItem item1 = new ListItem();
                item1.Text = (string)"20" + yearList[i];
                item1.Value = (string)yearList[i];
                year.Items.Add(item1);
            }
 
 
            CloseConnection();
        }
 
        if (!IsPostBack)
        {
            DateTimeFormatInfo dfi = new DateTimeFormatInfo();
            dfi.MonthDayPattern = "dd MMMM yy";
 
            DateTime now = DateTime.Now;
 
            string dateNow = now.ToString("m", dfi);
 
            string strDay = dateNow.Split(' ')[0];
            string strMonth = dateNow.Split(' ')[1];
            string strYear = dateNow.Split(' ')[2];
 
            string dateID = strMonth + " " + strYear;
            string todayDate = strDay;
 
            DisplayMonth(dateID , todayDate);
 
            dateDrop.Text = strDay;
            monthdrop.Text = strMonth;
            year.Text = strYear;
 
            DateTime datenowforcalendar = DateTime.Parse(dateNow);
 
            Calendar1.SelectedDate = datenowforcalendar;
            Calendar1.VisibleDate = datenowforcalendar;
 
        }
    }
 
 
 
  private void calEvents_DayRender(object sender, System.Web.UI.WebControls.DayRenderEventArgs e)
    {
        DateTimeFormatInfo dformat = new DateTimeFormatInfo();
        dformat.MonthDayPattern = "dd MMMM yy";
 
        DateTime datetoday = DateTime.Now;
 
        string todaysdate = datetoday.ToString("m", dformat);
 
        string strgDay = todaysdate.Split(' ')[0];
 
        int dblDay = Int32.Parse(strgDay);
 
        int celltext = Int32.Parse(e.Cell.Text);
 
        Style style = new Style();
 
        if (dblDay > e.Cell.Text)
        {
            style.BackColor = System.Drawing.ColorTranslator.FromHtml("#666666");
 
        }
 
    }

Open in new window

0
CharlieDev
Asked:
CharlieDev
  • 7
  • 4
2 Solutions
 
Jaime OlivaresCommented:
you should convert to integer before comparing a text:

 int cellvalue;
 if (int.TryParse(e.Cell.Text, out cellvalue) && dblDay > cellvalue)
{
    // etc
}
0
 
CharlieDevAuthor Commented:
I think that is working, but I'm not getting any background colour change

Can you see what might be wrong with my code :

 style.BackColor = System.Drawing.ColorTranslator.FromHtml("#666666");


I did just pinch it from an example i found on here
0
 
Anurag ThakurCommented:
because you have declared a style but you have never applied it to the day cell
do it something like this
e.Cell.BackColor = System.Drawing.Color.Wheat;
or
e.Cell.BackColor = System.Drawing.ColorTranslator.FromHtml("#666666");
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
CharlieDevAuthor Commented:
Thanks, I'm not managing to get it to work. I am wondering if I am not calling the function.
Should the private void calEvents_DayRender just automatically run do you know??
Cheers
0
 
Anurag ThakurCommented:
the event should be fired and the function should be called when a day is being rendered in the calendar control.
put a break point inside the day render event and see if the break point is being hit or not
also please confirm that your calendar control has registered to the dayrender event
0
 
CharlieDevAuthor Commented:
It seems that the dayrender event is not being executed. I am unsure how to tell with a breakpoint, I inserted one into the third line from the bottom of the dayrender event and then hovered over some of the above variables and they havent been filled, also i put a response.write at the very begining and this has not been displayed on the browser display aspx page.
I am now lost as to how to see if the calendar control has registered to the dayrender event.

Thanks for the help :)
0
 
Anurag ThakurCommented:
in your asp.net code do you have OnDayRender="calEvents_DayRender"
0
 
CharlieDevAuthor Commented:
I didnt have that reference in the asp calendar,ops.
I've put it in and i get this error:

CS0122: 'calendar_fixtcalendar.calEvents_DayRender(object, System.Web.UI.WebControls.DayRenderEventArgs)' is inaccessible due to its protection level

code line:   <asp:Calendar id="Calendar1"



which is from my aspx page code below

What does that mean?
Thank You
 <asp:Calendar id="Calendar1" 
                     BorderStyle="Double" 
                     BorderWidth="4px" 
                     BorderColor="green" 
                     DayStyle-BorderStyle="Solid" 
                     DayStyle-BorderWidth="1px"
                     OnSelectionChanged="Date_Selected"
                     OnDayRender="calEvents_DayRender"
                     width="429px"
                     height="280px"
                     Font-Name="Verdana" 
                     Font-Size="16px"
                     padding-left="5px"
                     NextPrevFormat="ShortMonth"
                     border-style="none"
                     text-decoration="none"
                     runat="server">
                   <TodayDayStyle />
                   <DayHeaderStyle Font-Bold="True"/>
                   <OtherMonthDayStyle ForeColor="gray"/>
                   <TitleStyle BackColor="#ffffff"
                               ForeColor="#000"
                               Font-Bold="True"/>
 
                   <SelectedDayStyle BackColor="#336633"
                                     Font-Bold="True"
                                     />
                   <NextPrevStyle ForeColor="#000"
                                  Font-Size="12px"/>
                   <SelectorStyle BackColor="#336633" 
                                  ForeColor="navy"
                                  Font-Size="9px"/>
                </asp:Calendar>
    <asp:Label ID="Label1" runat="server" ></asp:Label>
                    </div>

Open in new window

0
 
Anurag ThakurCommented:
make your event handler protected
protected  void calEvents_DayRender
0
 
CharlieDevAuthor Commented:
Thanks, its running that code now
0
 
CharlieDevAuthor Commented:
Problem solved, for anyone that might want the code below is the working c# code
protected void calEvents_DayRender(object sender, System.Web.UI.WebControls.DayRenderEventArgs e)
    {
        DateTimeFormatInfo dformat = new DateTimeFormatInfo();
        dformat.MonthDayPattern = "dd M";
 
        DateTime datetoday = DateTime.Now;
 
        string todaysdate = datetoday.ToString("m", dformat);
 
        string strgDay = todaysdate.Split(' ')[0];
        string strgMonth = todaysdate.Split(' ')[1];
 
        int dblDay = Int32.Parse(strgDay);
        int dblMonth = Int32.Parse(strgMonth);
 
        int celltext = Int32.Parse(e.Day.DayNumberText);
        int cellMonth = e.Day.Date.Month;
 
        
        if ((dblDay > celltext && dblMonth == cellMonth) || dblMonth > cellMonth)
        {
 
            e.Cell.BackColor = System.Drawing.ColorTranslator.FromHtml("#eeeeee");
            e.Cell.ForeColor = System.Drawing.ColorTranslator.FromHtml("#999999");
        }
 
    }

Open in new window

0
 
CharlieDevAuthor Commented:
Thanks again for your time, help and knowledge
0

Featured Post

Vote for the Most Valuable Expert

It’s time to recognize experts that go above and beyond with helpful solutions and engagement on site. Choose from the top experts in the Hall of Fame or on the right rail of your favorite topic page. Look for the blue “Nominate” button on their profile to vote.

  • 7
  • 4
Tackle projects and never again get stuck behind a technical roadblock.
Join Now