Question

loop through all controls on a page

Asked by: imsolost

I need to loop through all textbox's on a page and see if they = ""  I dont want to write code to name and test each individual textbox on the page.  That seems to be a waste of time.  

Thanks for the help.

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Asked On
2005-02-26 at 06:09:24ID21330148
Tags

loop

,

through

Topic

Programming for ASP.NET

Participating Experts
3
Points
500
Comments
7

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Answers

 

by: Arthur_WoodPosted on 2005-02-26 at 06:13:58ID: 13410386



For Each ctrl as Control in Me.Controls
    If TypeOf ctrl is TextBox then
        If ctrl.Text = "" then
             ' do something
        End If
    End If
Next

AW

 

by: NetDeveloperPosted on 2005-02-26 at 06:15:54ID: 13410393

       Dim c As Object    
        For Each c In Page.Controls
              'TextBox
             If (c.GetType().ToString().Equals("System.Web.UI.WebControls.TextBox")) Then
                  Dim tb As TextBox = CType(c, TextBox)
                  Response.Write("Valore (TextBox): " + tb.Text)              
               End If
         Next

 

by: imsolostPosted on 2005-02-27 at 15:37:24ID: 13416372

I get errors on both of these.

Arthur,

It says ctrl does not have a property text

Net

It loops through but it only sees 3 controls on the page.  There are 11 textbox's on the page.

 

by: NetDeveloperPosted on 2005-02-27 at 15:45:17ID: 13416406

Hi imsolost, does your textbox are *all* of kind System.Web.UI.WebControls.TextBox or you are using also simple HTML or HtmlTextBox controls ?

please tell me what u have in your page as I assumed youe textbox were only <asp:TextBox... controls

tnx

 

by: imsolostPosted on 2005-02-27 at 16:12:34ID: 13416486

all are asp.net controls.  Standard <asp:textbox runat=server id=someid/>

 

by: kaliyappan_kPosted on 2005-02-27 at 23:13:11ID: 13417684

public static void ClearFields(System.Web.UI.Control parent)
            {
                  foreach (Control c in parent.Controls)
                  {
                        switch(c.GetType().ToString())
                        {
                              case "System.Web.UI.WebControls.TextBox" :
                                    TextBox t = (TextBox)c;
                                    t.Text = "";
                                    break;
                              case "System.Web.UI.WebControls.DropDownList" :
                                    DropDownList d = (DropDownList)c;
                                    d.ClearSelection();
                                    break;
                              case "System.Web.UI.WebControls.ListBox":
                                    ListBox l = (ListBox)c;
                                    l.ClearSelection();
                                    break;
                              case "System.Web.UI.WebControls.RadioButtonList":
                                    RadioButtonList rl = (RadioButtonList)c;
                                    rl.ClearSelection();
                                    break;
                              case "System.Web.UI.WebControls.CheckBox":
                                    CheckBox chk = (CheckBox)c;
                                    chk.Checked = false;
                                    break;
                              case "System.Web.UI.WebControls.CheckBoxList":
                                    CheckBoxList cl = (CheckBoxList)c;
                                    cl.ClearSelection();
                                    break;
                              case "Infragistics.WebUI.WebSchedule.WebDateChooser":
                                    Infragistics.WebUI.WebSchedule.WebDateChooser dt = (Infragistics.WebUI.WebSchedule.WebDateChooser)c;
                                    dt.Value = null;
                                    break;
                              case "Infragistics.WebUI.WebDataInput.WebMaskEdit":
                                    Infragistics.WebUI.WebDataInput.WebMaskEdit m = (Infragistics.WebUI.WebDataInput.WebMaskEdit)c;
                                    m.Value=null;
                                    break;
                              case "ActiveUp.WebControls.ActiveDateTime":
                                    ActiveUp.WebControls.ActiveDateTime AT = (ActiveUp.WebControls.ActiveDateTime)c;
                                    AT.Date=Convert.ToDateTime(null);
                              break;
                              case "Infragistics.WebUI.WebCombo.WebCombo":
                                    Infragistics.WebUI.WebCombo.WebCombo wc = (Infragistics.WebUI.WebCombo.WebCombo)c;
                                    wc.SelectedIndex = 0;
                                    break;
                        }
                        if(c.HasControls())
                              ClearFields(c);
                  }
            }

You have to recursively call to get all the controls in  a page, since they may be present in a panel inside panel

This is what the above function does

To clear the entire form call this function passing the page as the argument

Hope this helps

Cheers
Kaliyappan

20120131-EE-VQP-002

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