Solved

c#, change button background color...

Posted on 2014-07-26
8
837 Views
Last Modified: 2014-07-29
In the event below, (sender as Button).ID gives the btn1, btn2, etc. that is pressed.

Question: How can I change the background color (change css file) of the pressed button?

The default CSS of the buttons are also included below.  Please suggest a nice looking pressed style if you know one.

Thank you

   protected void btn1_Click(object sender, EventArgs e)
    {

        string strNo="";

        switch ((sender as Button).ID)
        {
            case "btn1":
                strNo = "f123";
                break;
            case "btn2":
                strNo = "f123";
                break;
            case "btn3":
                strNo = "f123";
                break;
            case "btn4":
                strNo = "f456";
                break;
            case "btn5":
                strNo = "f456";
                break;
            case "btn6":
                strNo = "f456";
                break;
            case "btn7":
                strNo = "f7";
                break;
            case "btn8":
                strNo = "f8";
                break;
            case "btn9":
                strNo = "f9";
                break;
            case "btn10":
                strNo = "f10";
                break;
            case "btn11":
                strNo = "f11";
                break;
            case "btn12":
                strNo = "f12";
                break;
        }
            Response.Write(strNo);
            lblCmdOpt.Text = strNo;
            Session["strNo"] = strNo;
        //   Response.Redirect("Default2.aspx");
        } 

css:
#btn1, #btn2, #btn3, #btn4, #btn5, #btn6, #btn7, #btn8, #btn9, #btn10, #btn11, #btn12
 {
   background: #297cb3;
  background-image: -webkit-linear-gradient(top, #297cb3, #47a1d9);
  background-image: -moz-linear-gradient(top, #297cb3, #47a1d9);
  background-image: -ms-linear-gradient(top, #297cb3, #47a1d9);
  background-image: -o-linear-gradient(top, #297cb3, #47a1d9);
  background-image: linear-gradient(to bottom, #297cb3, #47a1d9);
  -webkit-border-radius: 6;
  -moz-border-radius: 6;
  border-radius: 6px;
  -webkit-box-shadow: 1px 2px 4px #797999;
  -moz-box-shadow: 1px 2px 4px #797999;
  box-shadow: 1px 2px 4px #797999;
  font-family: Arial;
  color: #ffffff;
  font-size: 16px;
  padding: 7px;
  border: solid #1f628d 0px;
  text-decoration: none;
}

Open in new window

PressedButton.png
0
Comment
Question by:Mike Eghtebas
  • 4
  • 4
8 Comments
 
LVL 13

Expert Comment

by:duncanb7
Comment Utility
Is it what your want ?why don't change it on CSS ?

DUncan

case "btn1":
                strNo = "f456";
               btn1.BackColor = Color.Orange; 
               break

Open in new window

;
0
 
LVL 33

Author Comment

by:Mike Eghtebas
Comment Utility
Hi Duncan,

Thank you for the response. I tried:
           string strBtn=((sender as Button).ID).ToString();
           Button btn = (Button)this.FindControl(strBtn);
           btn.BackColor = Color.Red;

it doesn't work, I suppose I have to use a session variable to store the name of the button and use it to change that button's color in Page_Load event. As it is, I am not seeing the change of color.

Question: If this sounds reasonable, how do I store the button name in the session variable and reuse it later on?

Thank again,

Mike
0
 
LVL 13

Accepted Solution

by:
duncanb7 earned 500 total points
Comment Utility
Dear Author,

If you provide more or complete code ( not security issue), it will assist on it
I don't know why I am only one to reply this thread. Could you click "Request Attention" to let other experts assist on it ?


Duncan
0
 
LVL 33

Author Comment

by:Mike Eghtebas
Comment Utility
Hi Duncan,

I have revised the code and all session variable works fine. The problem is that ultimately this is css determines what color is used.

Here is the cs code followed by the css for buttons.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;

public partial class MasterPage : System.Web.UI.MasterPage
{
    //Page myMaster = this as Page;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (IsPostBack)
        {
            lblCmdOpt.Text = "IsPostBack";
            if (Session["strBtn"] != null)
            {
                string strBtn = (string)Session["strBtn"];
                Button btn = (Button)this.FindControl(strBtn);
                btn.BackColor = Color.Red;
            }
        }
        else
        {
            lblCmdOpt.Text = (Session["strNo"]==null)? "is null":Session["strNo"].ToString();

        }

    }

    protected void btn1_Click(object sender, EventArgs e)
    {

        string strNo="";
        string strBtn=((sender as Button).ID).ToString();
        switch (strBtn)
        {
            case "btn1":
                strNo = "f123";
                break;
            case "btn2":
                strNo = "f123";
                break;
            case "btn3":
                strNo = "f123";
                break;
            case "btn4":
                strNo = "f456";
                break;
            case "btn5":
                strNo = "f456";
                break;
            case "btn6":
                strNo = "f456";
                break;
            case "btn7":
                strNo = "f7";
                break;
            case "btn8":
                strNo = "f8";
                break;
            case "btn9":
                strNo = "f9";
                break;
            case "btn10":
                strNo = "f10";
                break;
            case "btn11":
                strNo = "f11";
                break;
            case "btn12":
                strNo = "f12";
                break;
        }
            Response.Write(strNo);
            lblCmdOpt.Text = strNo;
            Session["strBtn"] = strBtn;
           Response.Redirect("Default2.aspx",false);
        } 
    }


'.
.
#btn1, #btn2, #btn3, #btn4, #btn5, #btn6, #btn7, #btn8, #btn9, #btn10, #btn11, #btn12
 {
   background: blue;
.
.
}

Open in new window

I think we need to have to have a second set of css for a class name .buttonPressed :
.buttonPressed 
 {
   background: red;
.
.
}

Open in new window

Now, the question really is how to add class="buttonPressed" to the pressed button identified by Session["strBtn"] variable in Page_Load event.

Question: Does this sound reasonable and the only solution?

Meanwhile I tested this and found out the when both ID and class are used in a css file, ID overwrites class. Meaning even if we could do the coding described above add a class to aspx file will not solve the problem.


Toggle Button example below may help with coming up with the solution: http://www.asp.net/AjaxLibrary/AjaxControlToolkitSampleSite/ToggleButton/ToggleButton.aspx

I am reading through but I have not use ajax before.

Thank you,

Mike
0
What Should I Do With This Threat Intelligence?

Are you wondering if you actually need threat intelligence? The answer is yes. We explain the basics for creating useful threat intelligence.

 
LVL 13

Expert Comment

by:duncanb7
Comment Utility
Thanks for your points

And it sounds correct  You get session data from other sites page , right ?
Be reminded, ajax is only allowed for the same domain communication within  both pages must
be at http://yourdomain for todays' browser since browser vendor change its policy .

Duncan
0
 
LVL 33

Author Comment

by:Mike Eghtebas
Comment Utility
Hi Duncan,

I used:
  int i;
       for (i = 1; i < 11; i++)
        {
            Button btn = (Button)this.FindControl("btn" + i.ToString());
           btn.BackColor = btn12.BackColor;
        }


        if (Session["pressedButton"] != null)
        {
            string strButton = Session["pressedButton"].ToString();
            Button btn = (Button)this.FindControl(strButton);
            btn.BackColor = Color.Orange;
            var c = btn12.BackColor;
            c = btn.BackColor;
        }

Open in new window


Note that btn12 has no settings (its blank and gets its style from a css file). So instead of:

btn.BackColor = ""; or btn.BackColor = null; I used btn.BackColor = btn12.BackColor;

At line 14 (var c = btn12.BackColor;) no settings for btn12 reads c="{Name=0, ARGB(0,0,0,0)}", and
At line 15 (c = btn.BackColor;) the settings for the current btn reads c="{Name=Orange, ARGB(255,255,165,0)}",

Question: Can I then replace line 5 (btn.BackColor = btn12.BackColor;) with:

btn.BackColor = "{Name=0, ARGB(0,0,0,0)}";

Because neither of btn.BackColor = ""; or btn.BackColor = null; work.

Mike
0
 
LVL 33

Author Comment

by:Mike Eghtebas
Comment Utility
0
 
LVL 13

Expert Comment

by:duncanb7
Comment Utility
I think I misunderstand your question in previous post, you are talking about
the CSS button or CSS output on the ajax website and you are NOT wanting to use Ajax to get session data,
Right ?

For the CSS priority, you can read this article about  style Precedence CSS, http://www.vanseodesign.com/css/css-specificity-inheritance-cascaade/
1-inline-style such as on tag style, for example, <a style="color:....>
2- css id
3- css class
4- css tag element

Duncan
0

Featured Post

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

SASS allows you to treat your CSS code in a more OOP way. Let's have a look on how you can structure your code in order for it to be easily maintained and reused.
CSS is a visual language used to classify objects and define rules about how they should be displayed. CSS skills aren’t restricted to developers anymore, there is a big benefit to having a basic understanding of the language, regardless of your occ…
In this tutorial viewers will learn how to style a decorative dropcap for the first letter in a paragraph using CSS. In CSS, create a new paragraph class by typing "p.fancy": Then, to style only the first letter of the first sentence, include the ps…
In this tutorial viewers will learn how to embed custom externally-hosted Google Fonts using the Google Font API in CSS Go to the Google Fonts website at google.com/fonts: Browse or search based on font properties or name to find a suitable font for…

772 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

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now