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POValidation controls not applicable to web custom controls in asp.net
 

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  1. POValidation controls not applicable to web custom controls in asp.net
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    <p>I have created a web custom control and used within an aspx page. I found the validation controls provided by asp.net are applicable to the built in server controls. I am not able to attach these validation controls with my custom control.</p> <p>For ex. If i am using TextBox control then the RequiredFieldValidator is applicable to it. but when i try to apply the same RequiredFieldValidator to my custom control it is not possible. The property "ControlToValidate" does not show the object id of my custom control. </p> <p>Could someone help me to rectify this problem?</p> <p>Thanks for sharing your valuable time.</p> <hr> <p>Below is the code from .cs file -</p> <pre><code>using System; using System.Collections.Generic; using System.ComponentModel; using System.Text; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Security.Permissions; [assembly: TagPrefix("DatePicker", "SQ")] namespace DatePicker { [DefaultProperty("Text")] [ToolboxData("&lt;{0}:DatePicker runat=server&gt;&lt;/{0}:DatePicker&gt;")] public class DatePicker : CompositeControl { //To retrieve value i am using textbox private TextBox _TxtDate = new TextBox(); // Image to select the calender date private Image _ImgDate = new Image(); // Image URL to expose the image URL Property private string _ImageUrl; // Exposing autopostback property private bool _AutoPostBack; // property get the value from datepicker. private string _Value; //CSS class to design the Image private string _ImageCssClass; //CSS class to design the TextBox private string _TextBoxCssClass; //to formate the date private string _DateFormat = "%m/%d/%Y"; //to hold javascript on client side static Literal _litJScript=new Literal(); private bool _includeJS = false; /**** properties***/ #region "[ Properties ]" [Bindable(true), Category("Appearance"), DefaultValue("")] public string ImageUrl { set { this._ImageUrl = value; } } [Bindable(true), Category("Appearance"), DefaultValue(""), Localizable(true)] public string Text { get { //String s = (String)ViewState["Text"]; //return ((s == null) ? string.Empty : s); return _Value = _TxtDate.Text; } set { ViewState["Text"] = value; _TxtDate.Text = value; _TxtDate.BackColor = System.Drawing.Color.White; } } [Bindable(true), Category("Appearance"), DefaultValue(""), Localizable(true)] public string Value { get { return _Value= _TxtDate.Text; } set { _Value = _TxtDate.Text = value; ViewState["Text"] = _Value; _TxtDate.BackColor = System.Drawing.Color.White; } } [Bindable(true), Category("Appearance"), DefaultValue(""), Localizable(true)] public bool AutoPostBack { get { return _AutoPostBack; } set { _AutoPostBack = value; } } [Bindable(true), Category("Appearance"), DefaultValue(""), Localizable(true)] public string ImageCssClass { get { return _ImageCssClass; } set { _ImageCssClass = value; } } [Bindable(true), Category("Appearance"), DefaultValue(""), Localizable(true)] public string TextBoxCssClass { get { return _TextBoxCssClass; } set { _TextBoxCssClass = value; } } [Bindable(true), Category("Custom"), DefaultValue(""), Localizable(true)] public string CommandName { get { string s = ViewState["CommandName"] as string; return s == null ? String.Empty : s; } set { ViewState["CommandName"] = value; } } [Bindable(true), Category("Custom"), DefaultValue(""), Localizable(true)] public string CommandArgument { get { string s = ViewState["CommandArgument"] as string; return s == null ? String.Empty : s; } set { ViewState["CommandArgument"] = value; } } [Bindable(true), Category("Custom"), DefaultValue(""), Localizable(true)] public string DateFormat { get { return _DateFormat; } set { _DateFormat = value; } } [Bindable(true), Category("Behavior"), DefaultValue("True")] public bool IncludeClientSideJS { get { return _includeJS; } set { _includeJS = value; } } [Bindable(true), Category("Behavior"), DefaultValue("True")] public override bool Enabled { get { return _TxtDate.Enabled; } set { _TxtDate.Enabled = value; _ImgDate.Visible = value; } } [Bindable(true), Category("Layout")] public override Unit Width { get { return base.Width; } set { base.Width = value; _TxtDate.Width = value; } } #endregion protected static readonly object EventCommandObj = new object(); public event CommandEventHandler Command { add { Events.AddHandler(EventCommandObj, value); } remove { Events.RemoveHandler(EventCommandObj, value); } } //this will raise the bubble event protected virtual void OnCommand(CommandEventArgs commandEventArgs) { CommandEventHandler eventHandler = (CommandEventHandler)Events[EventCommandObj]; if (eventHandler != null) { eventHandler(this, commandEventArgs); } base.RaiseBubbleEvent(this, commandEventArgs); } //this will be initialized to OnTextChanged event on the normal textbox private void OnTextChanged(object sender, EventArgs e) { if (this.AutoPostBack) { //pass the event arguments to the OnCommand event to bubble up CommandEventArgs args = new CommandEventArgs(this.CommandName, this.CommandArgument); OnCommand(args); } } protected override void OnInit(EventArgs e) { base.OnInit(e); AddStyleSheet(); AddJavaScript("DatePicker.Resources.prototype.js"); AddJavaScript("DatePicker.Resources.calendarview.js"); // For TextBox // setting name for textbox. using t just to concat with this.ID for unqiueName _TxtDate.ID = this.ID + "t"; // setting postback _TxtDate.AutoPostBack = this.AutoPostBack; // giving the textbox default value for date _TxtDate.Text = this.Value; //Initializing the TextChanged with our custom event to raise bubble event _TxtDate.TextChanged += new System.EventHandler(this.OnTextChanged); //Set max length _TxtDate.MaxLength = 10; //Setting textbox to readonly to make sure user dont play with the textbox //_TxtDate.Attributes.Add("readonly", "readonly"); // adding stylesheet _TxtDate.Attributes.Add("class", this.TextBoxCssClass); _TxtDate.Attributes.Add("onkeypress", "maskDate(event)"); _TxtDate.Attributes.Add("onfocusout","isValidDate(event)"); // For Image // setting alternative name for image _ImgDate.AlternateText = "imageURL"; if (!string.IsNullOrEmpty(_ImageUrl)) _ImgDate.ImageUrl = _ImageUrl; else { _ImgDate.ImageUrl = Page.ClientScript.GetWebResourceUrl(this.GetType(), "DatePicker.Resources.CalendarIcon.gif"); } //setting name for image _ImgDate.ID = this.ID + "i"; //setting image class for textbox _ImgDate.Attributes.Add("class", this.ImageCssClass); //Initialize JS with literal string s = "&lt;script language=\"javascript\"&gt;function maskDate(e){var evt=window.event || e;var srcEle = evt.srcElement?e.srcElement:e.target;"; s = s + "var myT=document.getElementById(srcEle.id);var KeyID = evt.keyCode;"; s = s + "if((KeyID&gt;=48 &amp;&amp; KeyID&lt;=57) || KeyID==8){if(KeyID==8)return;if(myT.value.length==2){"; s = s + "myT.value=myT.value+\"/\";}if(myT.value.length==5){myT.value=myT.value+\"/\";}}"; s = s + "else{window.event.keyCode=0;}}"; string s1 = "function isValidDate(e){var validDate=true;var evt=window.event || e;var srcEle = evt.srcElement?e.srcElement:e.target;"; s1 = s1 + "var myT=document.getElementById(srcEle.id);var mm=myT.value.substring(0,2);var dd=myT.value.substring(5,3);var yy=myT.value.substring(6);"; s1 = s1 + "var originalCss =myT.className; if(mm!=0 &amp;&amp; mm&gt;12){myT.value=\"\"; validDate=false;}else{if((yy % 4 == 0 &amp;&amp; yy % 100 != 0) || yy % 400 == 0){if(mm==2 &amp;&amp; dd&gt;29){"; s1 = s1 + "myT.value=\"\"; validDate=false;}}else{if(mm==2 &amp;&amp; dd&gt;28){myT.value=\"\"; validDate=false;}else{if(dd!=0 &amp;&amp; dd&gt;31){"; s1 = s1 + "myT.value=\"\"; validDate=false;}else{if((mm==4 || mm==6 || mm==9 || mm==11) &amp;&amp; (dd!=0 &amp;&amp; dd&gt;30)){myT.value=\"\"; validDate=false;}}}}}"; s1 = s1 + "if(!validDate){myT.style.backgroundColor='#FD9593';myT.focus;}else { myT.style.backgroundColor='#FFFFFF';}}&lt;/script&gt;"; _litJScript.Text = s+s1; } /// &lt;summary&gt; /// adding child controls to composite control /// &lt;/summary&gt; protected override void CreateChildControls() { this.Controls.Add(_TxtDate); this.Controls.Add(_ImgDate); if(_includeJS) this.Controls.Add(_litJScript); base.CreateChildControls(); } public override void RenderControl(HtmlTextWriter writer) { //render textbox and image _TxtDate.RenderControl(writer); _ImgDate.RenderControl(writer); if(_includeJS) _litJScript.RenderControl(writer); RenderContents(writer); } /// &lt;summary&gt; /// Adding the javascript to render the content /// &lt;/summary&gt; /// &lt;param name="output"&gt;&lt;/param&gt; protected override void RenderContents(HtmlTextWriter output) { StringBuilder calnder = new StringBuilder(); //adding javascript first if (Enabled) { calnder.AppendFormat(@"&lt;script type='text/javascript'&gt; document.observe('dom:loaded', function() {{ Calendar.setup({{ dateField: '{0}', triggerElement: '{1}', dateFormat: '{2}' }}) }}); ", _TxtDate.ClientID, _ImgDate.ClientID, _DateFormat); calnder.Append("&lt;/script&gt;"); } else { calnder.AppendFormat(@"&lt;script type='text/javascript'&gt; document.observe('dom:loaded', function() {{ Calendar.setup({{ dateField: '{0}', triggerElement: '{1}', dateFormat: '{2}' }}) }}); ", _TxtDate.ClientID, null, _DateFormat); calnder.Append("&lt;/script&gt;"); } output.Write(calnder.ToString()); } private void AddStyleSheet() { string includeTemplate = "&lt;link rel='stylesheet' text='text/css' href='{0}' /&gt;"; string includeLocation = Page.ClientScript.GetWebResourceUrl(this.GetType(), "DatePicker.Resources.calendarview.css"); LiteralControl include = new LiteralControl(String.Format(includeTemplate, includeLocation)); Page.Header.Controls.Add(include); } private void AddJavaScript(string javaScriptFile) { string scriptLocation = Page.ClientScript.GetWebResourceUrl(this.GetType(),javaScriptFile ); Page.ClientScript.RegisterClientScriptInclude(javaScriptFile, scriptLocation); } } } </code></pre>
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    1. PTQuestion
    1. USJohn Saunders
    1. USIrfanRaza
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      1. POValidation controls not applicable to web custom controls in asp.net
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      1. VTUpMod
    1. COLooks like you might have to use custom validator.
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      1. POValidation controls not applicable to web custom controls in asp.net
      1. USo.k.w
    2. COcan you please post your code, how you are coded your custom control and RequiredFieldValidator in aspx page
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      1. POValidation controls not applicable to web custom controls in asp.net
      1. USSaar
    3. COThanks for posting code, but you probably didn't need to post all of that code in order to show what the problem is.
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      1. POValidation controls not applicable to web custom controls in asp.net
      1. USJohn Saunders
 

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