Question

how can i hide html tables via code

Asked by: AlexPonnath

i have a App which requires the user to provide some information and then click a Button
up which on i execute a query. The resault is diplayed in an html table.
I am wondering how i can conttrol my html code via my vb.net code.

for example i have a table 1 which i want to only show if for example field in my
query returns a certain value ..

i am trying to understan how the vb code interacts with the display portion of the code

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Asked On
2004-12-09 at 20:11:32ID21237443
Tags

hide

,

table

,

how

,

html

Topic

Programming for ASP.NET

Participating Experts
3
Points
500
Comments
3

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Answers

 

by: ahmedrashidPosted on 2004-12-09 at 21:01:51ID: 12789910

first of all you need to make the table a Server Control like this:
<TABLE id="Table1" name="Table1" runat="server">
      <TR>
            <TD></TD>
            <TD></TD>
            <TD></TD>
      </TR>
</TABLE>

then in the code behind file, you can do the following:
Table1.Visible = false;

This is C# code but Im sure the VB code will be quite similar to this.
Hope this helps.

 

by: maulikCEPosted on 2004-12-10 at 16:01:20ID: 12797546

Another alternative could be inserting javascript, if you don want to go with RUNAT="SERVER" for html table.

Whenever I want some client code(java script kind of stuff), I prefer to use wonderful ASP.NET control called: <ASP:LITERAL> jus to render client side script, Jus think over it.

Like,put <asp:Literal ID="litTest" Runat="server"></asp:Literal> in ASPX and declare its server side objec by protected System.Web.UI.WebControls.Literal litTest

In the corrosponding codebehind file, assign client side script ( here hiding/showing table ) like this:

//To hide table with id='tblTest' set display attribte to 'none' and to show set it to 'inline'

litTest.Text="<script language='javascript'>document.getElementById('tblTest').style.display='none'</script>";

Regards.
maulikCE.

 

by: contosta1Posted on 2004-12-13 at 10:16:05ID: 12811645

You can use the <asp:panel> control to control html code via the code-behind page.  it's basically the same thing as ahmedrashid said to do.  I have used the <asp:panel> to hide only certain <tr>'s of a table, too.  If you use a Panel, be sure that the HTML renders as you want it to.  ASP.NET controls output html in different ways than you may think.

You can also use the <asp:placeholder> control if you are adding your form field controls from the code-behind. Placeholders only add the controls specified.  They do not add any additional HTML.

An example would be:

ASPX Page:

<form id="Form1" runat="server">
<asp:checkbox id="chk" runat="server" text="Check to hide table below" />
<asp:panel id="pTable" runat="server">
<table>
<tr><td><asp:textbox id="txt" runat="server /></td></tr>
</table>
</asp:panel>
</form>

Code-behind Page:

protected System.Web.UI.WebControls.Panel pTable;
protected System.Web.UI.WebControls.TextBox txt;
protected System.Web.UI.WebControls.CheckBox chk;


private void Page_Load(object sender, System.EventArgs e){

if (Page.IsPostBack){
    if (chk.Checked){
        pTable.Visible = false;
       
    else
        // do any processing that is needed.
}



---------------------------------------------------
You could also do this without using a Panel an example above showed.  Just remove the asp:panel code and id your table as pTable.  You would just replace the line:
              protected System.Web.UI.WebControls.Panel pTable;

to:
              protected System.Web.UI.HtmlControls.HtmlTable pTable.

tony

20120131-EE-VQP-002

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