how to highlight already selected items in listbox from database

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hello ,
my listbox selected item are astored in database as concatened with , now i want update my form i want to get selected with highligthing can u guide me or send any snipets

Posted 23-Apr-12 18:28pm

kingsa

Updated 23-Apr-12 18:29pm

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Sandeep Mewara · Answer 1 · 2012-04-23T19:14:00

Use event DataBound Event[^]

OnDataBound event, check if the value was earlier selected - if so, apply different style to that listitem. Define a Databound handler for the ListBox. During databind, the execution will go through this method then.

Something like:

C#

protected void lstMultipleValues_DataBound(object sender, EventArgs e)
{
  foreach (ListItem item in lstMultipleValues.Items)
  {
    //check anything out here
    if (item.Text.StartsWith("B"))
      item.Attributes.Add("style", "color:red");
  }
}

Steve Echols · Answer 2 · 2012-04-23T19:22:00

If you're trying to manually do it, and are not databound, something like this:

<asp:listbox id="list1" runat="server" selectionmode="Multiple" xmlns:asp="#unknown">
    <asp:listitem value="1" text="Apple"></asp:listitem>
    <asp:listitem value="2" text="Orange"></asp:listitem>
    <asp:listitem value="3" text="Banana"></asp:listitem>
    <asp:listitem value="4" text="Pear"></asp:listitem>
</asp:listbox>

Codebehind:

// Selections coming from your database
string selections = "2,4";  

// Create array of selected values
string[] selectedValues = selections.Split(',');

// Make sure there can be multiple value selected on you list box
list1.SelectionMode = ListSelectionMode.Multiple;

foreach (string value in selectedValues)
{
    ListItem item = list1.Items.FindByValue(value);
    if (item != null)
    {
	item.Selected = true;
    }
}

how to highlight already selected items in listbox from database

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