CssStyleCollection.Add Method (HtmlTextWriterStyle, String)

 

Adds a style item to the CssStyleCollection collection of a control using the specified HtmlTextWriterStyle enumeration value and corresponding value.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)

public void Add(
	HtmlTextWriterStyle key,
	string value
)

Parameters

key
Type: System.Web.UI.HtmlTextWriterStyle

The HtmlTextWriterStyle enumeration value to add to the collection.

value
Type: System.String

The value of the style attribute to add to the collection.

If the style item to add exists in the HtmlTextWriterStyle enumeration, use this Add overload of the Add method rather than the overload that does not take an HtmlTextWriterStyle parameter.

The following code example demonstrates how to use both overloads of the Add method to add a cascading style sheet to an HtmlSelect, HtmlInputSubmit, and a Label control programmatically.

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

  protected void SubmitBtn_Click(object sender, EventArgs e)
  {
    SubmitBtn.Style.Add("letter-spacing", "10px");
    FirstSelect.Style.Add(HtmlTextWriterStyle.Color, FirstSelect.Items[FirstSelect.SelectedIndex].Value.ToString());
    Message.Style.Add(HtmlTextWriterStyle.Color, FirstSelect.Items[FirstSelect.SelectedIndex].Value.ToString());
    Message.Text = "The select style is: " + FirstSelect.Style.Value;
  }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>CssStyleCollection Add</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    Select a color and then click submit.
    <br />
    <select id="FirstSelect" 
            style="font: 10pt verdana;color:black;" 
            runat="server">
        <option value="black">black</option>
        <option value="red">red</option>
        <option value="blue">blue</option>
        <option value="green">green</option>
    </select> 
    <input id="SubmitBtn" 
           value="Submit" 
           type="submit" 
           onserverclick="SubmitBtn_Click"
           runat="server" /><br/>
    <br />
    <asp:Label id="Message"
               runat="server"/>
    </div>
    </form>
</body>
</html>

.NET Framework
Available since 2.0
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