User Control Command Button Event Doesn't Fire The First Time?

Jan 23, 2011

I am fairly new to the asp.net and experimenting with it to learn the page life cycle. Here is a problem that I have been unable to resolve for past few days.

I have a hosting page (.aspx). Then I have two user controls (.ascx). The page has a place holder control in which it loads the user controls one at a time based on the application flow. First user control is loaded on application start up. It has a "continue" button. Continue button click loads the Second user control that has two buttons - "Back" and "Submit". Obviously the "Back" button should load the first user control again and Submit button should submit the form data. Pretty simple.

The problem is that the command button event handler that I have on the second user control is not firing the first time. (I have one event handler for both buttons). The load event of the user control fires but then it ignores the button click. If I click it again, then it fires. I re-load the controls on the page in every page_load. Here is some relevent code:

AddPlayer.aspx:

[Code]....

The page_Load fires every time but "CommandBtn_Click" doesn't fire after the first click. I have to do it click it again. It doesn't matter which order I click the buttons.

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Edit:
Menu.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Security.Permissions;
using System.Collections;
using System.ComponentModel.Design;
using System.Drawing.Design;
using System.Web.UI.HtmlControls;
using System.IO;
namespace MenuServerControl
{
[AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[DefaultProperty("MenuItems")]
[ParseChildren(true, "MenuItems")]
[ToolboxData("<{0}:Menu runat="server"> </{0}:Menu>")]
public class Menu : WebControl
{
#region Fields
private List<MenuItem> _MenuItems;
string _Direction
{
get
{
string direction = "";
switch (this.Direction)
{
case Directions.LeftToRight:
direction = "direction:ltr;";
break;
case Directions.RightToLeft:
direction = "direction:rtl;";
break;
default:
direction = "direction:rtl;";
break;
}
return direction;
}
}
string _AnimationDelay
{
get
{
if (AnimationDelay == null)
AnimationDelay = 1000;
return AnimationDelay.ToString().ToLower();
}
}
string _AnimationType
{
get
{
switch (this.AnimationType)
{
case AnimationType.Opacity_Height:
return "animation:{opacity:'show',height:'show'}";
case AnimationType.Opacity_Width:
return "animation:{opacity:'show',width:'show'}";
case AnimationType.Opacity:
return "animation:{opacity:'show'}";
case AnimationType.Height:
return "animation:{height:'show'}";
case AnimationType.Width:
return "animation:{width:'show'}";
case AnimationType.Height_Toggle:
return "animation: {height: 'toggle'}";
case AnimationType.Width_Toggle:
return "animation: {width: 'toggle'}";
default:
return "animation:{opacity:'show',height:'show'}";
}
}
}
string _AnimationSpeed
{
get
{
switch (this.AnimationSpeed)
{
case AnimationSpeed.Fast:
return "speed:'fast'";
case AnimationSpeed.Normal:
return "speed:'normal'";
case AnimationSpeed.Slow:
return "speed:'slow'";
default:
return "speed:'fast'";
}
}
}
string FloatStyle
{
get
{
if (Direction == Directions.RightToLeft)
return "float:right;";
else return "";
}
}
string _Main_ul_CssClass = "";
#endregion
#region Properties
public string Main_ul_CssClass
{
get
{
if (string.IsNullOrEmpty(_Main_ul_CssClass)) return "";
_Main_ul_CssClass = "class=" + _Main_ul_CssClass;
return _Main_ul_CssClass;
}
set
{
_Main_ul_CssClass = value.Trim();
}
}
public Directions Direction { get; set; }
public int? AnimationDelay { get; set; }
public AnimationType AnimationType { get; set; }
public AnimationSpeed AnimationSpeed { get; set; }
public bool DropShadow { get; set; }
public bool AutoArrows { get; set; }
[Category("Behavior")]
[Description("The menu collection")]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
[PersistenceMode(PersistenceMode.InnerDefaultProperty)]
public List<MenuItem> MenuItems
{
get
{
if (_MenuItems == null)
_MenuItems = new List<MenuItem>();
return _MenuItems;
}
}
public VerOrHor VerticalOrHorizontal { get; set; }
#endregion
#region Methods
public Menu()
{
DropShadow = true;
AutoArrows = true;
}
public override void RenderBeginTag(HtmlTextWriter writer)
{
writer.Write("<div id="" + this.ID + "" style="" + _Direction + " " + FloatStyle + "">");
}
public override void RenderEndTag(HtmlTextWriter writer)
{
writer.Write("</div>");
}
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
#region Adding Script & link Tags
HtmlGenericControl jquery = new HtmlGenericControl("script");
jquery.Attributes.Add("type", "text/javascript");
jquery.Attributes.Add("src", Page.ClientScript.GetWebResourceUrl(typeof(MenuServerControl.Menu), "MenuServerControl.JavaScriptFiles.jquery_1_4_3.js"));
jquery.EnableViewState = false;
Page.Header.Controls.Add(jquery);
HtmlGenericControl hoverIntent = new HtmlGenericControl("script");
hoverIntent.Attributes.Add("type", "text/javascript");
hoverIntent.Attributes.Add("src", Page.ClientScript.GetWebResourceUrl(typeof(Menu), "MenuServerControl.JavaScriptFiles.hoverIntent.js"));
hoverIntent.EnableViewState = false;
Page.Header.Controls.Add(hoverIntent);
HtmlGenericControl jquery_bgiframe_min = new HtmlGenericControl("script");
jquery_bgiframe_min.Attributes.Add("type", "text/javascript");
jquery_bgiframe_min.Attributes.Add("src", Page.ClientScript.GetWebResourceUrl(typeof(Menu), "MenuServerControl.JavaScriptFiles.jquery_bgiframe_min.js"));
jquery_bgiframe_min.EnableViewState = false;
Page.Header.Controls.Add(jquery_bgiframe_min);
HtmlGenericControl superfish = new HtmlGenericControl("script");
superfish.Attributes.Add("type", "text/javascript");
superfish.Attributes.Add("src", Page.ClientScript.GetWebResourceUrl(typeof(Menu), "MenuServerControl.JavaScriptFiles.superfish.js"));
superfish.EnableViewState = false;
Page.Header.Controls.Add(superfish);
HtmlGenericControl supersubs = new HtmlGenericControl("script");
supersubs.Attributes.Add("type", "text/javascript");
supersubs.Attributes.Add("src", Page.ClientScript.GetWebResourceUrl(typeof(Menu), "MenuServerControl.JavaScriptFiles.supersubs.js"));
supersubs.EnableViewState = false;
Page.Header.Controls.Add(supersubs);
if (Direction == Directions.LeftToRight)
{
HtmlGenericControl csslink = new HtmlGenericControl("link");
csslink.Attributes.Add("href", Page.ClientScript.GetWebResourceUrl
(typeof(Menu), "MenuServerControl.CSS.superfish.css"));
csslink.ID = "NavigationMenu";
csslink.Attributes.Add("type", "text/css");
csslink.Attributes.Add("rel", "stylesheet");
csslink.EnableViewState = false;
Page.Header.Controls.Add(csslink);
}
else
{
HtmlGenericControl csslink = new HtmlGenericControl("link");
csslink.Attributes.Add("href", Page.ClientScript.GetWebResourceUrl
(typeof(Menu), "MenuServerControl.CSS.RightToLeft superfish.css"));
csslink.ID = "NavigationMenu";
csslink.Attributes.Add("type", "text/css");
csslink.Attributes.Add("rel", "stylesheet");
csslink.EnableViewState = false;
Page.Header.Controls.Add(csslink);
}
if (this.VerticalOrHorizontal == VerOrHor.Vertical && this.Direction == Directions.RightToLeft)
{
HtmlGenericControl csslink01 = new HtmlGenericControl("link");
csslink01.Attributes.Add("href", Page.ClientScript.GetWebResourceUrl
(typeof(Menu), "MenuServerControl.CSS.RightToLeft superfish-vertical.css"));
csslink01.Attributes.Add("type", "text/css");
csslink01.Attributes.Add("rel", "stylesheet");
csslink01.EnableViewState = false;
Page.Header.Controls.Add(csslink01);
}
else if (this.VerticalOrHorizontal == VerOrHor.Vertical)
{
HtmlGenericControl csslink01 = new HtmlGenericControl("link");
csslink01.Attributes.Add("href", Page.ClientScript.GetWebResourceUrl
(typeof(Menu), "MenuServerControl.CSS.superfish-vertical.css"));
csslink01.Attributes.Add("type", "text/css");
csslink01.Attributes.Add("rel", "stylesheet");
csslink01.EnableViewState = false;
Page.Header.Controls.Add(csslink01);
}
#endregion
}
protected override void RenderContents(HtmlTextWriter output)
{
output.Write(CreateMenuHtmlTags());
}
StringBuilder CreateMenuHtmlTags()
{
if (this._MenuItems == null)
throw new Exception("تگ های مربوط به منو را کامل کنید");
StringBuilder Html = new StringBuilder("");
#region Add <Script>
if (String.IsNullOrEmpty(Main_ul_CssClass))
Html.Append("<script>$(document).ready(function() { $("ul.sf-menu").superfish({pathLevels: 1,");
else
Html.Append("<script>$(document).ready(function() { $("ul." + Main_ul_CssClass + "").superfish({ pathLevels: 1,");
Html.Append("delay:" + _AnimationDelay + ",");
Html.Append(_AnimationType + ",");
Html.Append(_AnimationSpeed + ",");
Html.Append("dropShadows: " + DropShadow.ToString().ToLower() + ",");
Html.Append(@"autoArrows: " + AutoArrows.ToString().ToLower() + "});});</script>");
#endregion
if (string.IsNullOrEmpty(Main_ul_CssClass) && VerticalOrHorizontal == VerOrHor.Vertical)
Html.Append("<ul class="sf-menu sf-vertical sf-js-enabled sf-shadow" id='sample-menu-1'>");
else if (String.IsNullOrEmpty(Main_ul_CssClass))
Html.Append("<ul class="sf-menu sf-js-enabled sf-shadow" id='sample-menu-1'>");
else
Html.Append("<ul class="" + Main_ul_CssClass + "" id='sample-menu-1'>");
foreach (MenuItem item in _MenuItems)
{
if (item == null) continue;
if (item.SubMenuItems != null && item.SubMenuItems.Count > 0)
{
Html.Append("<li" + item.li_CssClass + ">");
Html.Append("<a href="" + item.Href + "">" + item.Text.Trim() + "</a>");
ParseSubMenuItems(ref Html, item);
Html.Append("</li>");
}
else if (item.SubMenuItems != null)
Html.Append("<li" + item.li_CssClass + "><a href="" + item.Href + "">" + item.Text.Trim() + "</a></li>");
}
Html.Append("</ul>");
return Html;
}
void ParseSubMenuItems(ref StringBuilder Html, MenuItem menuItems)
{
if (menuItems == null) return;
Html.Append("<ul " + menuItems.ul_CssClass + " style="display: none; visibility: hidden;">");
foreach (var item in menuItems.SubMenuItems)
{
if (item == null) continue;
MenuItem Sub_MenuItem = item as MenuItem;
WebControl webControl = item as WebControl;
if (Sub_MenuItem != null)
{
if (Sub_MenuItem.SubMenuItems != null && Sub_MenuItem.SubMenuItems.Count > 0)
{
Html.Append("<li" + Sub_MenuItem.li_CssClass + ">");
Html.Append("<a href="" + Sub_MenuItem.Href + "">" + Sub_MenuItem.Text.Trim() + "</a>");
ParseSubMenuItems(ref Html, Sub_MenuItem);
Html.Append("</li>");
}
else if (Sub_MenuItem.SubMenuItems != null)
Html.Append("<li" + Sub_MenuItem.li_CssClass + "><a href="" + Sub_MenuItem.Href + "">" + Sub_MenuItem.Text.Trim() + "</a></li>");
}
else if (webControl != null)
{
Html.Append("<li>");
webControl.EnableViewState = true;
this.Controls.Add(webControl);
webControl.EnableViewState = true;
StringBuilder sb = new StringBuilder();
sb.Append("<div>");
using (StringWriter sw = new StringWriter(sb))
{
using (HtmlTextWriter textWriter = new HtmlTextWriter(sw))
{
webControl.RenderControl(textWriter);
}
}
sb.Append("</div>");
Html.Append(sb.ToString());
Html.Append("</li>");
}
}
Html.Append("</ul>");
}
#endregion
}
}
MenuItem.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;
namespace MenuServerControl
{
[DefaultProperty("SubMenuItems")]
[ParseChildren(true, "SubMenuItems")]
[TypeConverter(typeof(ExpandableObjectConverter))]
public class MenuItem : INamingContainer
{
#region Fields
ArrayList _SubMenuItems;
string text = "";
string href = "#";
string _ul_CssClass = "";
string _li_CssClass = "";
#endregion
#region Properties
[Description("متن منو آیتم")]
[DefaultValue("")]
[NotifyParentProperty(true)]
public string Text
{
get
{
return text;
}
set
{
text = value;
}
}
[DefaultValue("#")]
[Description("<a /> href attribute")]
[NotifyParentProperty(true)]
public string Href
{
get
{
return href;
}
set
{
href = value;
}
}
[DefaultValue("")]
[Description("<ul /> css class")]
[NotifyParentProperty(true)]
public string ul_CssClass
{
get
{
if (string.IsNullOrEmpty(_ul_CssClass)) return "";
_ul_CssClass = " class="" + _ul_CssClass + """;
return _ul_CssClass;
}
set { this._ul_CssClass = value.Trim(); }
}
[DefaultValue("")]
[Description("<li /> css class")]
[NotifyParentProperty(true)]
public string li_CssClass
{
get
{
if (string.IsNullOrEmpty(_li_CssClass)) return "";
_li_CssClass = " class="" + _li_CssClass + """;
return _li_CssClass;
}
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}
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[Description("The MenuItems collection")]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
[PersistenceMode(PersistenceMode.InnerDefaultProperty)]
public ArrayList SubMenuItems
{
get
{
if (_SubMenuItems == null)
_SubMenuItems = new ArrayList();
return _SubMenuItems;
}
}
#endregion
}
}

You can download the project from here.

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