How can i refer to a textbox that i don't know it's name? - visual-c++

Question

I'm using VC++ 2008 (Windows Form Application C++\CLR), I created dynamic array of textboxes (the user defines how many textboxes he wants to create), and i want to make a KeyPress event handler, in order to prevent Chars (i want these textboxes to be numerical only, and accept only one dot "for decimal numbers"). So how can I refer to the textbox that the user is using (the textbox that the cursor on for example) is there any way i can do this? The function looks like:
private: System::Void textBox_KeyPress(System::Object^ sender, System::Windows::Forms::KeyPressEventArgs^ e) {
if(e->KeyChar == '.')
{
if(this->/*the textbox in use*/->Text->Contains(".") && !this->/*the textbox in use*/->SelectedText->Contains("."))
e->Handled = true;
}
else if(!Char::IsDigit(e->KeyChar) && e->KeyChar != 0x08)
e->Handled = true;
}

Answer 1

private void CreateTextBoxControls()
{
intColCount= Convert.ToInt32(txtColumnNo.Text.ToString().Trim());
int rowCount =0;
Table tblHead = new Table();
if (tblHead.GetType().ToString().Equals("System.Web.UI.WebControls.Table") && PHOptions.FindControl("tblHead") == null )
{
tblHead.ID = "tblHead";
tblHead.EnableViewState = true;
tblHead.BorderWidth=Unit.Pixel(0);
tblHead.CellSpacing = 0;
tblHead.CellPadding = 1;
tblHead.Width = Unit.Percentage(96);
TableRow rH = new TableRow();
TableCell cH = new TableCell();
cH.Text= "Table Heading" ;
cH.Font.Bold = true;
rH.Cells.Add(cH);
tblHead.Rows.Add(rH);
PHOptions.Controls.Add(tblHead);
if(intColCount>0)
rH.Visible =true;
else
rH.Visible =false;
}
Table tblHelp = new Table();
if (tblHelp.GetType().ToString().Equals("System.Web.UI.WebControls.Table") && PHOptions.FindControl("tblHelp") == null )
{
tblHelp.ID = "tblHelp";
}
tblHelp.EnableViewState = true;
tblHelp.BorderWidth=Unit.Pixel(1);
tblHelp.CellSpacing = 0;
tblHelp.CellPadding = 1;
tblHelp.BorderWidth = Unit.Pixel(1);
tblHelp.Width = Unit.Percentage(96);
for (int rowIndex=0; rowIndex<=rowCount; rowIndex++)
{
TableRow r = new TableRow();
TableRow rWeight= new TableRow();
//r.ID = "rLabel";
TableRow rID = new TableRow();
for (int clIndex=0; clIndex<intColCount; clIndex++)
{
TableCell c = new TableCell();
txtBox = new TextBox();
if (txtBox.GetType().ToString().Equals("System.Web.UI.WebControls.TextBox") && PHOptions.FindControl("txtOption"+(clIndex+1).ToString()) == null )
{
txtBox.ID ="txtOption"+(clIndex+1).ToString();
//txtBox.Text = (clIndex+1).ToString();
txtBox.Width= Unit.Pixel(45);
txtBox.MaxLength = 2;
c.BorderWidth=Unit.Pixel(1);
c.Width=Unit.Pixel(80);
c.Controls.Add(txtBox);
r.Cells.Add(c);
txtBox.PreRender += new System.EventHandler(this.txtBox_PreRender);
}
}
tblHelp.Rows.Add(r);
}
TableRow rSubmit = new TableRow();
TableCell cSubmit = new TableCell();
cSubmit.ColumnSpan = intColCount ;
btnSubmitButton = new Button();
btnSubmitButton.ID ="btnSubmit";
btnSubmitButton.Text= "Submit";
if( PHOptions.FindControl("btnSubmit") == null )
cSubmit.Controls.Add(btnSubmitButton);
cSubmit.Attributes.Add("Align","Center");
rSubmit.Cells.Add(cSubmit);
tblHelp.Rows.Add(rSubmit);
PHOptions.Controls.Add(tblHelp);
this.btnSubmitButton.PreRender += new System.EventHandler(this.btnSubmitButton_PreRender);
this.btnSubmitButton.Click += new System.EventHandler(this.btnSubmitButton_Click);
}
private void btnSubmitButton_Click(object sender, System.EventArgs e)
{
for (int clIndex=0; clIndex<intColCount; clIndex++)
{
string boxName = "txtOption" + (clIndex+1).ToString();
TextBox tb = PHOptions.FindControl(boxName) as TextBox;
if( lblDisplay.Text != "" )
lblDisplay.Text+=","+tb.Text ;
else
lblDisplay.Text=tb.Text ;
}
}
Just refer this code ...
(this contains both for creating textbox dynamically and read from textbox)