private static String en(Control p, JsonObjectMode mode)
{
string retVal = "";
foreach (Control c in p.Controls)
{
if (!String.IsNullOrEmpty(c.ID))
{
retVal +=
(counter > 0 ? "," : "")
+ c.ID
+ ":\""
+ (mode == JsonObjectMode.ById ? "#" : "")
+ c.ClientID
+ "\"";
counter++;
switch (c.GetType().ToString())
{
case "System.Web.UI.WebControls.CheckBoxList":
case "System.Web.UI.WebControls.RadioButtonList":
case "System.Web.UI.WebControls.ListBox":
case "System.Web.UI.WebControls.DropDownList":
case "System.Web.UI.HtmlControls.HtmlSelect":
ListControl cc = (ListControl)c;
if (cc.Items.Count > 0)
{
for (Int32 index = 0; index < cc.Items.Count; index++)
{
retVal +=
(counter > 0 ? "," : "")
+ c.ID + "_" + index
+ ":\""
+ (mode == JsonObjectMode.ById ? "#" : "")
+ c.ClientID + "_" + index
+ "\"";
counter++;
}
}
break;
}
}
retVal += en(c, mode);
}
return (retVal);
}
/// <summary>
/// Insert a script block which creates a JSON object with an array of
/// client control ID names for all server-side controls. This allows access
/// to the objects using javascript. It is best used in the Page_PreRender block.
/// <example>
/// <code>
/// using Argentini.Halide;
/// ...
/// H3ClientSide.CreateJsonIdArray(MyPanel, "en", H3ClientSide.JsonObjectMode.ByID);
/// </code>
/// Assuming that there is a server-side control on the page, with the ID
/// "Control01", its run-time ID is something cryptic, like "ctl00_Body_Control01".
/// After the code above is executed, however, Javascript code on the page itself
/// can refer to all server-side controls by their server-side ID's, as:
/// <code>
/// var obj = document.getElementById(en.Control01);
/// $(en.Control01).value = "test";
/// </code>
/// </example>
/// </summary>
/// <param name="pageObject">The Page object.</param>
/// <param name="containerControl">The container for which all children should be used.</param>
/// <param name="objectName">Name for the object with the array of names.</param>
/// <param name="mode">JsonObjectMode enumeration which specifies how page
/// objects are to be identified; by ID or CSS class name.</param>
public static void CreateJsonIdArray(Page pageObject, Control containerControl, string objectName, JsonObjectMode mode)
{
if (objectName.Contains(" "))
{
throw new Exception("CreateJsonIdArray objectName cannot contain spaces");
}
else
{
counter = 0;
string script = en(containerControl, mode);
pageObject.ClientScript.RegisterClientScriptBlock(typeof(Page), objectName, objectName + "={" + script + "};", true);
}
}