Web Forms :: User Control Command Button Event Doesn't Fire The First Time
Jan 19, 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.
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.
A little confused on something. I have a User Control in a master page. In the User Control there are image buttons. when I try to wire any click event even to say update a label in the User Control itself, nothing gets updated.
It is as if the postback is not handled at all.
What I want to do is click the image button in the User Control and then change a value in the master page. This could happen a few ways but for example it could update a public property or a control itself like a textbox or label.
I've run into a problem with one of my web sites and I am having trouble figuring out the problem and a good solution. This is my scenario: I have a user control that displays a slideshow with images and some text that changes every fifteen seconds. To do this, I have an update panel that contains a timer control with an interval of 15000. It calls a method called slideshowTimer_Tick in the codebehind. The web page that contains this user control is a relatively simple page; no update panels or timers, just divs.
The problem I have is that if I have two of these user controls on the page, the tick event only fires for the first control. It never fires for the second control, although the control is full initialized otherwise.
I have a datalist that loops thru cart items. Within the datalist template I call a user control that has a small form that gets repeated for each item. When this control is called outside of the datalist, the form submits fine, but when called within the datalist the button has no event action. I've tried adding an event handler to ItemDataBound of the datalist, but still no event action. How can I get my form to submit?
I'm trying to manually create a button and add a Click event handler for it in code. However when the button is clicked the event handler doesn't seem to react on event (or event isn't called).
we tested the code in Visual Studio 2008 and everything worked just as it should. And I'm using Visual Web Developer 2005 XE. So I assume that I'm missing something to be done manually being in VWD 2005 XE, or the problem is in VWD 2005 XE it self.
Here's an odd one that I've never seen before. Only on IIS, not in Cassini but in all web browsers I have a button that posts back and the page_load event fires, but the actual button click event doesn't fire. there is no re-writing of the page or anything else happening.
i have a JQuery ui dialog box that opens up as a contact form when a link is clicked, which works fine, my problem is trying to submit the information.
When you click the send button it fires a button click event of another asp:button ive got hidden on the page...
the post back event fires and the page reloads but the asp:button click event doesn't not fire?
MdsMenu:MenuItem is my custom WebControl. If I insert a Button control out of MdsMenu:MenuItem tag it works well but if I inserted it within MdsMenu:MenuItem tag it doesn't fire the concerned method. What's wrong with my code?
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; } set { this._li_CssClass = value.Trim(); } } [Category("Behavior")] [Description("The MenuItems collection")] [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] [PersistenceMode(PersistenceMode.InnerDefaultProperty)] public ArrayList SubMenuItems { get { if (_SubMenuItems == null) _SubMenuItems = new ArrayList(); return _SubMenuItems; } } #endregion } }
I have a modalpopup that i have opening on a radiobutton selection. That works great, opens when it should and closes when you click cancel. BUT i have the following on my cancel button event that is not firing
[Code]....
I also have a button event for my "OK" button and that works great, but my cancel event doesnt seem to fire or work. Maybe the ClearSelection() is not what i need..
I want to clear the radiobutton if they cancel out of the ModalPopUp so they can make a new selection, since its a required field.
i have two nested gridview inside an update panel. there is a button called btnPhoneEdit inside the child grid view. when the button gets clicked, it do cause partial post back as expected but it fails to invoke btnPhoneEdit_Click.
here is how my grid view looks like and how i add my custom data source to both parent and child grid view. [Code]....
I'm customizing a NopCommerce store, and am using a gridview to display and sort the products. All that works well. I like how the external pager (user control) works with the gridview, with one exception -- it uses the hyperlink control, so I lost viewstate, which I need to retain for both the search page and to retain the gridview sort options. Based on the page selected (from the pager control), I query the database and rebind the gridview. So, I switched the user control to use LinkButtons instead of Hyperlinks. This is the sample code for one of the buttons:
[Code]....
I set a breakpoint inside the lbCommandClick method, but it never gets hit. Reading other posts tells me that I would have to add the dynamic controls in the OnLoad method, but since this all happens based on other data on the page (say search results), I don't think I can do it onLoad. However, the link buttons do work to cause a postback, and my viewstate is saved correctly. The only problem is that I do not know which button was clicked. I could check Request.Params["__EVENTTARGET"] onLoad, but that is kind of a hack -- I'd much rather be able to set the event handler in the user control and use the CommandArgument property. But, what I have tried so far fails.
Especially one that would allow me to set the EventHandler in the User Control? (e.g. OnlbCommand="PagerLBPageChange" )
I am building a website whereby people, before checking out of the shopping cart (and transferring to the payment iframe) can select which items from the shopping cart list to delete. The results from the shopping card are listed in a Repeater control. There is a Button in the Repeater which deletes a record from the database (used LINQ to SQL to do that.)
THe problem is that the ItemCommand event doesn't fire when i click the button. I tried 'response.write(test)' and it still would not work. It is as if the repeater cannot interact with the commands. It does render the results tho.
I am building a website whereby people, before checking out of the shopping cart (and transferring to the payment iframe) can select which items from the shopping cart list to delete. The results from the shopping card are listed in a Repeater control. There is a Button in the Repeater which deletes a record from the database (used LINQ to SQL to do that.)
The problem is that the ItemCommand event doesn't fire when i click the button. I tried response.write(test) and it still would not work.
It is as if the repeater cannot interact with the commands. It does render the results though.
I recently came across the AsyncFileUpload control in the latest (3.0.40412) release of the ASP.Net Ajax Control Toolkit. There appears to be an issue when using it in a hidden control that is later revealed, such as a <div> tag with visible=false.
I have a need to improve the asthetics of the standard buttons .net churns out. I am fully aware of how to do this using css but I can only really style the button if I add a span element inside the button. Luckily the link button allows this so I have got the following which for usability i have put inside a user control.
I have exposed elements so that I can set values from within my aspx.cs page, these are text, command name, command argument, ccc class etc.
As it is a generic control, I have added OnCommand='Button_Click" which fires the event in the control itself. The Button_Click event calls a method ButtonControls passing associated command name and arguments across. ButtonControls uses the name to call the appropriate function.
As these are all very generic buttons, so far so good, but I have a need to trigger button events that may not be generic i.e on a control I have buttons that do something very specific to that control. I also have a requirement to call functions which relate to specific controls on the aspx page. I have created a user control which encapsulates the link button control.
I have a user control with two drop down, on selection change of first dropdown second dropdown should get populated. Now when I place this user control in a aspx file, I need to access the second dropdown value on change of send dropdown .
eg: in ascx file
Department drop down and employee dropdown. on change of department dropdown, employee dropdown should populate. (which is working fine for me)
in aspx.cs file
on change of employee dropdown, I need to get the employee id and so some other operation. (I am struggling here)
Is there any way where I can fire usercontrol event from aspx.cs file?
Is it possible to do this? Or do I need to make a server control for this functionality? I have it being able to be set in the Page_Init, but I'd like to make it as similar to actual controls as possible. Also, if it is possible to access via the Events section under Properties, that would be good and 2. I am trying to register the web user control as an AsyncPostbackTrigger for another UpdatePanel. With the previous question in mind, is it also possible to set this via the GUI, or does this need to be set programmatically as well?
