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POformatting controls on Page_Load(81 textboxes)
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  1. POformatting controls on Page_Load(81 textboxes)
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    copied!<p>I have a sudoku grid with 81 cells(asp:textboxes) which I've labeled: _c11.._c12.._c13.._c99 I'm trying to format the textboxes on page load. The current code I have is returning 81 controls, but when I do formatting in the last loop its give me a null reference error.. Excuse my horrible coding.. please :)</p> <pre><code>ArrayList sudokuCells = new ArrayList(); for(int i = 11; i &lt; 100; i++) { if (i == 20 || i == 30 || i == 40 || i == 50 || i == 60 || i == 70 || i == 80 || i == 90) continue; else { TextBox cell = (TextBox)Page.FindControl("_c" + i.ToString()); sudokuCells.Add(cell); } } _c11.Text = sudokuCells.Count.ToString(); foreach (TextBox cell in sudokuCells) { cell.ForeColor = System.Drawing.Color.Red; cell.MaxLength = 1; } </code></pre> <p>this is in page_load, I'm not exactly why it's giving me a null reference, because I'm referencing all textbox controls in cell then adding that reference to the arraylist.</p> <p>Obviously, I'm missing something will someone please educate me?</p> <p>Ok.. Page.FindControl("_c11") returns a null; even though I have them defined in my aspx page.</p> <pre><code>&lt;%@ Page Title="" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="Content.aspx.cs" Inherits="Sudoku.Content" %&gt; &lt;asp:Content ID="_content1" ContentPlaceHolderID="head" runat="server"&gt; &lt;link rel="stylesheet" type="text/css" href="styles/style.css" /&gt; &lt;/asp:Content&gt; &lt;asp:Content ID="_content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"&gt; &lt;div id="wrapper"&gt; &lt;table cellpadding="0" cellspacing="0" class="sudokuTable"&gt; &lt;tr&gt; &lt;td class="column1NoBottomBorder"&gt;&lt;asp:TextBox ID="_c11" runat="server" CssClass="sudokuCell"&gt;&lt;/asp:TextBox&gt;&lt;/td&gt; &lt;td class="column2NoBottomBorder"&gt;&lt;asp:TextBox ID="_c12" runat="server" CssClass="sudokuCell"&gt;&lt;/asp:TextBox&gt;&lt;/td&gt; &lt;td class="column3NoBottomBorder"&gt;&lt;asp:TextBox ID="_c13" runat="server" CssClass="sudokuCell"&gt;&lt;/asp:TextBox&gt;&lt;/td&gt; &lt;td class="column4NoBottomBorder"&gt;&lt;asp:TextBox ID="_c14" runat="server" CssClass="sudokuCell"&gt;&lt;/asp:TextBox&gt;&lt;/td&gt; &lt;td class="column5NoBottomBorder"&gt;&lt;asp:TextBox ID="_c15" runat="server" CssClass="sudokuCell"&gt;&lt;/asp:TextBox&gt;&lt;/td&gt; &lt;td class="column6NoBottomBorder"&gt;&lt;asp:TextBox ID="_c16" runat="server" CssClass="sudokuCell"&gt;&lt;/asp:TextBox&gt;&lt;/td&gt; &lt;td class="column7NoBottomBorder"&gt;&lt;asp:TextBox ID="_c17" runat="server" CssClass="sudokuCell"&gt;&lt;/asp:TextBox&gt;&lt;/td&gt; &lt;td class="column8NoBottomBorder"&gt;&lt;asp:TextBox ID="_c18" runat="server" CssClass="sudokuCell"&gt;&lt;/asp:TextBox&gt;&lt;/td&gt; &lt;td class="column9NoBottomBorder"&gt;&lt;asp:TextBox ID="_c19" runat="server" CssClass="sudokuCell"&gt;&lt;/asp:TextBox&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; </code></pre>
 

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