如何在CascadingDropDownNameValue中使一些列表项无法选择 [英] how can i make some list items unselectable in my CascadingDropDownNameValue

问题描述

在此列表中我想为我的字符串Telugu添加红色并使其成为不可选择的

提前感谢

列表<   CascadingDropDownNameValue  >  list = new List <   CascadingDropDownNameValue  > ; （）; 
 
 string [] singlemoviedetails = null; 
 
 list.Add（new CascadingDropDownNameValue（TELUGU，TELUGU））; 
 
 
 foreach（字符串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（）））; 
 
 
 
 
 
} //如果
} 

解决方案

您可以使用Dropdownlist的Databound事件来更改项目的颜色。



尝试类似

 受保护  void  DropDownList1_DataBound（ object  sender，EventArgs e）
 {
  foreach （ListItem item  in  DropDownList1.Items）
 {
 
  if （ string  .Compare（item.Text， < span class =code-string> Telugu， true ）==  0 ）  //  更改条件 
 {
 item.Attributes.Add（  style，  background-color：＃110001）;  //  根据需要应用任何样式 
 item.Selected =  false ;  //  或根据您的需要启用虚假 
} 
} 
} 

希望这有帮助...

我通过javascript写如下来解决它...

 <   script    < span class =code-attribute> type   =  text / javascript >  
函数setcolor（ddl）{
 for（i = 0; i <     ddl.options.length;     i ++）    {  
   
                          如果   （ddl.options [i] .value     =   =  TELUGU）    {  
   
                                   ddl.options [i] .style.color     = 红色 ;   
   
                                   ddl.options [i] .disabled     =  disabled ;   
   
   
   
                          }   
   
  }   
   
  }   
   
   
   
  < asp：dropdownlist     id   =  dropmovie    runat   =  server    class   =  ddl     onclick   = < span class =code-keyword> setColor（this）;    style   =  width：210px;高度：30PX; background-color：＃40E0D0    xmlns：asp   = ＃unknown >  <   / asp：dropdownlist  >  

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

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
               }

解决方案

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

Try something like

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...

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

<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>

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