how can i make some list items unselectable in my CascadingDropDownNameValue

Question

1.00/5 (1 vote)

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in this list i want to add red color to my string Telugu and make it as unselectable
thanks in advance

XML

List<CascadingDropDownNameValue> list = new List<CascadingDropDownNameValue>();

               string[] singlemoviedetails = null;

               list.Add(new CascadingDropDownNameValue("TELUGU", "TELUGU"));


               foreach (string single_moviedetails in total_moviedetails)
               {
                   singlemoviedetails = single_moviedetails.Split('~');


                   if ("TELUGU".Equals(singlemoviedetails[2].ToString()))
                   {

                       list.Add(new CascadingDropDownNameValue(singlemoviedetails[1].ToString(), singlemoviedetails[0].ToString()));
                      

                       
                     

                   }//if
               }

Posted 18-Nov-13 17:36pm

teja sai ravi

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Comments

teja sai ravi 19-Nov-13 1:46am

please help me how can i add colors to my list items in my cascading dropdown list

JoCodes 19-Nov-13 1:48am

You want to add color for all the Listitems in the dropdown list or only some of those?

teja sai ravi 19-Nov-13 2:06am

thanks for ur reply friend.. for some of them only.

JoCodes 19-Nov-13 2:08am

Have you tried the Databound event of the dropdown?

JoCodes 19-Nov-13 2:16am

Have added a solution ... can you try and revert ?

2 solutions

Solution 1

You can use the Databound event of the Dropdownlist for changing the color of the item.

Try something like

C#

protected void DropDownList1_DataBound(object sender, EventArgs e)
        {
            foreach (ListItem item in DropDownList1.Items)
            {               
               
                if (string.Compare(item.Text, "Telugu",true)==0)//change the condition 
                { 
                    item.Attributes.Add("style", "background-color:#110001");//apply any style as your need
                    item.Selected = false;// Or enabled false as per your need
                }
            }
        }

Hope this helps...

Posted 18-Nov-13 20:15pm

JoCodes

Comments

teja sai ravi 19-Nov-13 2:22am

hi friend i tried like this but it is giving error as object reference not set to value why because bindig is done in webmethod in asmx page

JoCodes 19-Nov-13 2:27am

Can you show the code?It shouldnt be a problem since this dropdown should be bound on selection of parent dropdown , right?

teja sai ravi 19-Nov-13 2:35am

yes friend but data bound event also not firing i think for data bounding it will go to web method in asmx page..

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teja sai ravi · Accepted Answer · 2013-11-18T20:25:00

i solved it by writing in javascript as follows...

XML

<script type="text/javascript">
    function setcolor(ddl) {
        for (i = 0; i < ddl.options.length; i++) {
            if (ddl.options[i].value == "TELUGU") {
                ddl.options[i].style.color = "red";
                ddl.options[i].disabled = "disabled";

            }
}
}

<asp:dropdownlist id="dropmovie" runat="server" class="ddl" onclick="setColor(this);" style="width:210px; height:30px; background-color:#40E0D0" xmlns:asp="#unknown"></asp:dropdownlist>