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POHow to call a method on image button click dynamically created in C Sharp?
 

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  1. POHow to call a method on image button click dynamically created in C Sharp?
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    <p>I have made a form which adds controls dynamically with user selecting the type of control he wants which is placed inside a placeholder .. Now i want add a Image Button Click event to dynamically created Image Button .. Which I have no success in for the past two days .. I have tried using delegates n event handling which is a new concept for me .. I am using this to iterate and assign properties</p> <pre><code> &lt; void IterateThroughChildren(Control parent) { foreach (Control c in parent.Controls) { if (c.GetType().ToString().Equals("System.Web.UI.WebControls.ImageButton") &amp;&amp; c.ID == null) { ((ImageButton)c).ImageUrl = @"pictures/close-icon.png"; ((ImageButton)c).ID = "Imagebtn" +count.ToString(); ((ImageButton)c).Click += new ImageButtonClickEventHandler(UserControl1_ImageButtonClickEvent); }&gt; </code></pre> <p>And m using this delegate and event handlers to specify the function </p> <pre><code> &lt;public delegate void ImageButtonClickEventHandler(Object sender, EventArgs args); public event ImageButtonClickEventHandler ImageButtonClickEvent; private void imageButton_Click(object sender, System.EventArgs e) { if (ImageButtonClickEvent != null) { ImageButtonClickEvent(sender, e); } } private void UserControl1_ImageButtonClickEvent(Object sender, EventArgs args) { CreateRadioButtons(sender , args); }&gt; </code></pre> <p>**</p> <blockquote> <p>I would also like to know other methods of calling a function on dynamically created conlrols ..</p> </blockquote> <p>**</p> <p>Thanks in advance for any kind of assistant .. here is the complete code ..</p> <pre><code> &lt;using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class _Default : System.Web.UI.Page { int count = 1; static int m = 0; static int n = 0; protected void Page_Load(object sender, EventArgs e) { btnAddControl.Visible = false; btnAddText.Visible = false; } void IterateThroughChildren(Control parent) { foreach (Control c in parent.Controls) { if (c.GetType().ToString().Equals("System.Web.UI.WebControls.TextBox") &amp;&amp; c.ID == null) { ((TextBox)c).ID = "txtQ" + count.ToString(); ((TextBox)c).Text = "Add Text Here" + count.ToString(); ((TextBox)c).Columns = 90; ((TextBox)c).Focus(); //((TextBox)c).TextChanged = "CreateRadioButtons()"; // ((TextBox)c).Attributes["onclick"] = "this.CreateRadiobuttons()"; //((TextBox)c).TextChanged(); //+= CreateRadioButton; //((TextBox)c).Focus = CreateRadioButtons(); count++; } if (c.GetType().ToString().Equals("System.Web.UI.WebControls.RadioButton") &amp;&amp; c.ID == null) { } if (c.GetType().ToString().Equals("System.Web.UI.WebControls.ImageButton") &amp;&amp; c.ID == null) { ((ImageButton)c).ImageUrl = @"pictures/close-icon.png"; ((ImageButton)c).ID = "Imagebtn" +count.ToString(); ((ImageButton)c).Click += new ImageClickEventHandler(_Default_Click); ((ImageButton)c).Click += new ImageClickEventHandler(CreateRadioButtons); } if (c.GetType().ToString().Equals("System.Web.UI.WebControls.Label") &amp;&amp; c.ID == null) { ((Label)c).Text = count.ToString() + "."; } if (c.Controls.Count &gt; 0) { IterateThroughChildren(c); } } } void _Default_Click(object sender, ImageClickEventArgs e) { CreateRadioButtons(sender,e); throw new NotImplementedException(); } protected void abc_acb( object sender, EventArgs e) { } protected void CreateRadioButtons(object sender, EventArgs e) { if (Page.IsPostBack == true) { btnAddControl.Visible = true; m++; // now, create n TextBoxes, adding them to the PlaceHolder TextBoxesHere for (int i = 0; i &lt; m; i++) { PlaceHolder1.Controls.Add(new RadioButton()); PlaceHolder1.Controls.Add(new TextBox()); PlaceHolder1.Controls.Add(new ImageButton()); LiteralControl literalBreak3 = new LiteralControl("&lt;br /&gt;"); PlaceHolder1.Controls.Add(literalBreak3); LiteralControl literalBreak = new LiteralControl("&lt;br /&gt;"); PlaceHolder1.Controls.Add(literalBreak); LiteralControl literalBreak2 = new LiteralControl("&lt;br /&gt;"); PlaceHolder1.Controls.Add(literalBreak2); } EventHandler eh = new EventHandler(CreateRadioButtons); TextBox Mytextbox = new TextBox(); Mytextbox.ID = "123"; Mytextbox.Columns = 90; Mytextbox.AutoPostBack = true; Mytextbox.Text = "Click to create another option"; Mytextbox.TextChanged += eh; //Mytextbox.TextChanged += CreateRadioButtons; PlaceHolder1.Controls.Add(new RadioButton()); PlaceHolder1.Controls.Add(Mytextbox); LiteralControl literalBreak4 = new LiteralControl("&lt;br /&gt;"); PlaceHolder1.Controls.Add(literalBreak4); LiteralControl literalBreak5 = new LiteralControl("&lt;br /&gt;"); PlaceHolder1.Controls.Add(literalBreak5); // now, set the Text property of each TextBox IterateThroughChildren(this); } } protected void CreateTextBoxes(object sender , EventArgs e) { btnAddText.Visible = true; if (Page.IsPostBack == true) { n++; // now, create n TextBoxes, adding them to the PlaceHolder TextBoxesHere for (int i = 0; i &lt; n; i++) { TextBoxesHere.Controls.Add(new Label()); TextBoxesHere.Controls.Add(new TextBox()); TextBoxesHere.Controls.Add(new ImageButton()); LiteralControl literalBreak = new LiteralControl("&lt;br /&gt;"); TextBoxesHere.Controls.Add(literalBreak); LiteralControl literalBreak1 = new LiteralControl("&lt;br /&gt;"); TextBoxesHere.Controls.Add(literalBreak1); } // now, set the Text property of each TextBox IterateThroughChildren(this); } } protected void ddlSelectControl_SelectedIndexChanged(object sender, EventArgs e) { string a = ddlSelectControl.SelectedValue.ToString(); if (a == "0") { CreateRadioButtons(sender, e); } else { CreateTextBoxes(sender ,e); } } } &gt; </code></pre>
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    1. COHow are you creating them ? these controls will have to be re created for every postback
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    2. COImage button have "ImageClickEventArgs" not "EventArgs"..
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    3. COI am using the object to create new text box , image controls yeahthey are being recreated actually i was trying to form google doc form type functionin
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