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POWhy does findcontrol need unique id, when I have given it the row to scan
 

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  1. POWhy does findcontrol need unique id, when I have given it the row to scan
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    <h1>The code</h1> <pre><code> public partial class Table_Traversing : System.Web.UI.Page { Table table1 = new Table(); Button button1 = new Button(); protected void Page_Load(object sender, EventArgs e) { for (int adding_rows = 0; adding_rows &lt; 4; adding_rows++) { TableRow table_row1 = new TableRow(); TableCell table_cell1 = new TableCell(); TableCell table_cell2 = new TableCell(); Label The_text = new Label(); CheckBox checkmate = new CheckBox(); The_text.Text = "This is the text :-)"; checkmate.ID = "checkmate"; table_cell2.Controls.Add(checkmate); table_cell1.Controls.Add(The_text); table_row1.Controls.AddAt(0, table_cell1); table_row1.Controls.AddAt(1, table_cell2); table1.Rows.Add(table_row1); } button1.Text = "click me to export the value"; form1.Controls.AddAt(0, table1); form1.Controls.AddAt(1, button1); button1.Click += new EventHandler(button1_Click); } void button1_Click(object sender, EventArgs e) { CheckBox check_or_not = new CheckBox(); for (int i = 0; i &lt; table1.Rows.Count; i++) { check_or_not = (CheckBox)table1.Rows[i].FindControl("checkmate"); Response.Write(check_or_not.Checked.ToString()); } } } </code></pre> <h2>The error</h2> <blockquote> <p>Multiple controls with the same ID 'checkmate' were found. FindControl requires that controls have unique IDs.</p> <p>Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. </p> <p>Exception Details: System.Web.HttpException: Multiple controls with the same ID 'checkmate' were found. FindControl requires that controls have unique IDs.</p> </blockquote>
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. USuser287745
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

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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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