Textbox_changed event not recognized, code-behind generated texbox

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C#

.NET

web

event

Hello Experts,

I am currently trying to use a code-behind created TextBox as the trigger for a TextBox_Changed event. I am able to get the TextBox created and even able to get EventHandler registered and assigned to the TextBox. However when I get to Debugging, I am receiving a browser error message in IE (I must develop for this browser - company guideline!). The error is 'TextBox_TextChanged' is undefined.

Here is my Code for creating the TextBox (actually a series of boxes, but it is the same for each one) -

//  If session variable is visible in the grid, add its text box and description one column over

if (sessVars[i].Keyvis == true)
{
    TextBox txtBxNm = new TextBox();
    txtBxNm.Width = 48;
    txtBxNm.ID = "txtBoxNomPt" + rw + cl;
    txtBxNm.AutoPostBack = true;
    txtBxNm.Attributes.Add("OnChange", "TextBox_TextChanged");
    txtBxNm.TextChanged += new EventHandler(TextBox_TextChanged);
    this.NomFlds.Rows[rw].Cells[cl].Controls.Add(txtBxNm);
    if (sessVars[i].Value != "" && sessVars[i] != null)
    {
        txtBxNm.Text = sessVars[i].Value.ToString();
    }

    this.NomFlds.Rows[rw].Cells[cl + 1].Text = sessVars[i].PosDesc.ToString();
}

The above Code appears inside my page_load / !=IsPostBack load of the page. Later on in the class code-behind I have the following method code for the event -

protected void TextBox_TextChanged(object sender, EventArgs e)
       {
           sql_val nom_p_des = new sql_val();
           Control control = (Control)sender;
           TextBox thisctrl = new TextBox();
           control = (Control)thisctrl;
           String ctrlName = control.ID;
           int nmlen = ctrlName.Length;
           int rmdr = nmlen - 11;
           int posid = int.Parse(ctrlName.Substring(12, rmdr).ToString());
           nom_p_des.Num_whr_flds = 0;

           switch (posid)
           {
               case 00:
                   nom_p_des.Frm_table = "Position1";
                   nom_p_des.Keycall = true;
                   nom_p_des.Dtypefld = "str";
                   nom_p_des.Keypos = 1;

                   break;
               case 01:
                   nom_p_des.Frm_table = "Position2";
                   nom_p_des.Keycall = true;
                   nom_p_des.Dtypefld = "str";
                   nom_p_des.Keypos = 2;

                   break;

….. It continues (but I don't make it this far!)

What I have tried:

I have tried changing the event (first I had the problem it wasn't even firing, then I changed to TextBoxChanged and it started firing - good). Now I am beginning to think there is some sort of rendering issue. When I look at Browser Debugger versions of other standard TextBox_Changed Events in other pages, they are render liked this inside the HTML -

onchange="javascript:setTimeout('__doPostBack(\'ctl00$TurbineWheel$TWExdDiam\',\'\')', 0)"

When I look at the Browser Debugger version of the Events for the code-behind generated Textboxes, they look like this after rendering in HTML -

onchange="TextBox_TextChanged;setTimeout('__doPostBack(\'

So it appears as if the conversion to JavaScript is missing. Not sure why. I would appreciate any / all help. Thanks.

---Ray