Solved

using c# to manipulate the look of the calendar object

Posted on 2008-10-27
12
486 Views
Last Modified: 2012-05-05
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
Comment
Question by:CharlieDev
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 7
  • 4
12 Comments
 
LVL 55

Assisted Solution

by:Jaime Olivares
Jaime Olivares earned 150 total points
ID: 22811742
you should convert to integer before comparing a text:

 int cellvalue;
 if (int.TryParse(e.Cell.Text, out cellvalue) && dblDay > cellvalue)
{
    // etc
}
0
 

Author Comment

by:CharlieDev
ID: 22811890
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
 
LVL 26

Expert Comment

by:Anurag Thakur
ID: 22813218
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
Salesforce Made Easy to Use

On-screen guidance at the moment of need enables you & your employees to focus on the core, you can now boost your adoption rates swiftly and simply with one easy tool.

 

Author Comment

by:CharlieDev
ID: 22813322
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
 
LVL 26

Expert Comment

by:Anurag Thakur
ID: 22813431
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
 

Author Comment

by:CharlieDev
ID: 22813651
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
 
LVL 26

Expert Comment

by:Anurag Thakur
ID: 22814024
in your asp.net code do you have OnDayRender="calEvents_DayRender"
0
 

Author Comment

by:CharlieDev
ID: 22814541
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
 
LVL 26

Accepted Solution

by:
Anurag Thakur earned 350 total points
ID: 22814665
make your event handler protected
protected  void calEvents_DayRender
0
 

Author Comment

by:CharlieDev
ID: 22820119
Thanks, its running that code now
0
 

Author Comment

by:CharlieDev
ID: 22820123
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
 

Author Closing Comment

by:CharlieDev
ID: 31510249
Thanks again for your time, help and knowledge
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
It was really hard time for me to get the understanding of Delegates in C#. I went through many websites and articles but I found them very clumsy. After going through those sites, I noted down the points in a easy way so here I am sharing that unde…
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

696 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question