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PODynamic buttons in GridView - Button.Click event not firing
 

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  1. PODynamic buttons in GridView - Button.Click event not firing
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    <p>I have a GridView control bound to an AccessDataSource. After selecting a row I'm creating a table inside the selected row. I'm adding Buttons to this table. Their Click event never gets fired. I read about recreating the buttons and stuff, but still no luck solving the issue. Thanks for help!</p> <p>.aspx:</p> <pre><code>&lt;%@ Page Language="C#" AutoEventWireup="true" CodeFile="AdminSurvey.aspx.cs" Inherits="AdminSurvey" %&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; &lt;head runat="server"&gt; &lt;title&gt;&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;form id="form1" runat="server"&gt; &lt;asp:GridView ID="id_survey_grid_view" runat="server" DataSourceID="id_access_data_source" SkinID="default_skin" AllowSorting="True" AutoGenerateColumns="false" OnRowCreated="SurveyGridView_RowCreated"&gt; &lt;Columns&gt; &lt;asp:HyperLinkField HeaderText="Title" SortExpression="TITLE" DataTextField="TITLE" DataNavigateUrlFields="SURVEY_ID" DataNavigateUrlFormatString="~\AdminSurvey.aspx?survey_id={0}"&gt; &lt;/asp:HyperLinkField&gt; &lt;/Columns&gt; &lt;/asp:GridView&gt; &lt;asp:AccessDataSource ID="id_access_data_source" runat="server" DataFile="~/App_Data/database.mdb" OldValuesParameterFormatString="original_{0}" OnLoad="InitAccessDataSource"&gt; &lt;/asp:AccessDataSource&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>.cs:</p> <pre><code>public partial class AdminSurvey : System.Web.UI.Page { private const string ID_BUTTON_SUBMIT = "SUBMIT_BUTTON"; private const string ID_BUTTON_DELETE = "SUBMIT_DELETE"; private string _selected_survey; protected void SurveyGridView_RowCreated(Object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow &amp;&amp; e.Row.DataItem != null &amp;&amp; !IsPostBack) { string survey = ((DataRowView)e.Row.DataItem).Row.ItemArray[0].ToString(); if (survey.Equals(_selected_survey)) { e.Row.Cells[0].Controls.Clear(); // create table e.Row.Cells[0].Controls.Add(createSurveyTable(((DataRowView)e.Row.DataItem).Row.ItemArray[0].ToString(), ((DataRowView)e.Row.DataItem).Row.ItemArray[1].ToString(), ((DataRowView)e.Row.DataItem).Row.ItemArray[2].ToString())); ViewState["row_index"] = Convert.ToString(e.Row.RowIndex); ViewState["survey_id"] = ((DataRowView)e.Row.DataItem).Row.ItemArray[0].ToString(); ViewState["title"] = ((DataRowView)e.Row.DataItem).Row.ItemArray[1].ToString(); ViewState["description"] = ((DataRowView)e.Row.DataItem).Row.ItemArray[2].ToString(); } } else if(e.Row.RowType == DataControlRowType.DataRow &amp;&amp; e.Row.DataItem != null &amp;&amp; IsPostBack) { string row_idx = (string)ViewState["row_index"]; if (row_idx != null &amp;&amp; e.Row.RowIndex.Equals(Convert.ToInt32(row_idx))) { _selected_survey = (string)ViewState["survey_id"]; string title = (string)ViewState["title"]; string description = (string)ViewState["description"]; e.Row.Cells[0].Controls.Clear(); // recreate table e.Row.Cells[0].Controls.Add(createSurveyTable(_selected_survey, title, description)); } } } private Table createSurveyTable(string survey_id, string title, string description) { Table table = new Table(); TableRow row = new TableRow(); TableCell cell = new TableCell(); Table questions_table = createQuestionsTable(survey_id); cell.Controls.Add(questions_table); row.Cells.Add(cell); table.Rows.Add(row); return table; } private Table createQuestionsTable(string survey_id) { // submit row TableRow submit_row = new TableRow(); TableCell submit_cell = new TableCell(); submit_button = new Button(); submit_button.Text = "Submit"; submit_button.ID = ID_BUTTON_SUBMIT; submit_button.Click += new EventHandler(submitButton_Click); submit_cell.Controls.Add(submit_button); delete_button = new Button(); delete_button.Text = "Delete"; delete_button.ID = ID_BUTTON_DELETE; delete_button.Click += new EventHandler(deleteButton_Click); submit_cell.Controls.Add(delete_button); submit_row.Cells.Add(submit_cell); table.Rows.Add(submit_row); return table; } private void submitButton_Click(object sender, EventArgs e) { } private void deleteButton_Click(object sender, EventArgs e) } } // class </code></pre>
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
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    1. COyour createQuestionsTable method called after page_load and you are adding a event for dynamic buttons, so you are very late in the page life cycle to add this button. You have to create button and events at most Page_Load event to work correctly. Any controls like button and having events added after Page_Load wont fire the event handler appropriately.
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      1. PODynamic buttons in GridView - Button.Click event not firing
      1. USFredrick Gauss
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

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