Web Development

21-Dec-05 16:37

hi to all,

merry christmas too Smile | :)

just wondering if someone can help me resolve this issue please?

i have the following code

    <%
      Hashtable items = CartItems;
        
      foreach(string item in items.Keys)
      {
        object[] vals = (object[])items[item];          
        int qty = (int)vals[1];
        decimal cost = (decimal)vals[2];          
        decimal total = (decimal)vals[3];
        string image = (string)vals[4];

        string pid = item + "_qty";
                                                
    %>  
    <tr align="center" valign="middle" class="artistType">
    <td>
    <img src="<%= image %>" width="<%= THUMB_WIDTH %>" height="<%= THUMB_HEIGHT %>" />
    </td>
    <td><%= item %></td>
    <td>$<%= cost %></td>
    <td>
      < asp:TextBox id="<%= pid %>" style="WIDTH:25px" maxlength="2" Runat="server"   
        <%= qty %>
      < /asp:TextBox >                                               
    </td>
    <td>$<%= total %></td>
  </tr>
<% } %>

i am getting error like

' cannot have <%...%> in server tag ' and
' <%= pid %> is not a valid identifier '

can anyone tell me how to achieve this please ?

btw i have spaced tag content so as to preserve formatting Smile | :)

regards,
g00fy

Christian Graus21-Dec-05 16:41

Christian Graus

21-Dec-05 16:41

Bloody hell. What you're doing is trying to use ASP.NET as if it was asp. Stop it now !!!!

What you need to do is buy a book on ASP.NET and learn how it works. For this specific task, a repeater is probably sufficient. That's a control that you can bind your keys collection to, and then define how to render one key, and it will do it for all of them.

Christian Graus - Microsoft MVP - C++

g00fyman22-Dec-05 1:21

22-Dec-05 1:21

ok i have that worked out, thank you for the direction.

however i have looked (book & google) on how to set a dynamic id to the textbox, so i can get the values on postback.

can you offer any advice on this issue please?

this is what i have now.

<ItemTemplate>
                                    <tr class="artistType" vAlign="middle" align="center">
                                      <td><img src='<%# DataBinder.Eval(Container.DataItem,"OrderSummaryImageUrl") %>' height="<%# THUMB_HEIGHT %>" width="<%# THUMB_WIDTH %>" /></td>
                                      <td><%# DataBinder.Eval(Container.DataItem, "OrderSummaryProductCode") %></td>
                                      <td>
// this is where i want to set the id to the product code, so i can check its new quantity
< asp:TextBox AutoPostBack="True" id='<%# DataBinder.Eval(Container.DataItem, "OrderSummaryProductCode") %>' style="width:25px;" Text='<%# DataBinder.Eval(Container.DataItem, "OrderSummaryProductQuantity") %>' runat="server" MaxLength="2" / ></td>
                                      <td>$<%# DataBinder.Eval(Container.DataItem, "OrderSummaryProductCost") %></td>
                                      <td>$<%# DataBinder.Eval(Container.DataItem, "OrderSummaryProductTotal") %></td>
                                      <td></td>
                                    </tr>
                                  </ItemTemplate>

regards,
g00fy

-- modified at 7:25 Thursday 22nd December, 2005

this works for text attribute but not id

g00fyman22-Dec-05 2:18

22-Dec-05 2:18

ok i have worked it out using a datalist instead of a repeater.

Christian Graus22-Dec-05 9:34

Christian Graus

22-Dec-05 9:34

Sorry, I was home when you posted all of this ( different time zone ). I'm glad you worked it out, and I have to say, your code took a quantum leap, which is great.

Christian Graus - Microsoft MVP - C++

g00fyman22-Dec-05 17:22

22-Dec-05 17:22

ok i have changed it back to a repeater, and i cannot get it to update now.

is this the same problem or similar that is listed here [ http://support.microsoft.com/?kbid=197428 ] or is there another problem i am missing in my code?

< asp : Repeater id="cartItems" runat="server" DataSource="<%# orderSummaryDataSet %>" DataMember="OrderSummary1" >
< HeaderTemplate >
<table width=85% cellpadding="3" cellspacing="3">
<tr class="artistType" vAlign="middle" align="center">
<th> </th>
<th>Product Code</th>
<th>Quantity</th>
<th>Item Cost</th>
<th>Item Total</th>
<th>Cart Total</th>
</tr>
<tr class="artistType" vAlign="middle" align="center">
<th colspan="5">
 </th>
<th style="color:red;">
<%# CartTotal %>
</th>
</tr>
</ HeaderTemplate >
< FooterTemplate >
</table>
< /FooterTemplate >
< ItemTemplate >
<tr class="artistType" vAlign="middle" align="center">
<td>
<input type="hidden" name="code" id="code" runat="server" value='<%# DataBinder.Eval(Container.DataItem, "OrderSummaryProductCode") %>' / >
<img src='<%# DataBinder.Eval(Container.DataItem,"OrderSummaryImageUrl") %>' height="<%# THUMB_HEIGHT %>" width="<%# THUMB_WIDTH %>" />
</td>
<td><%# DataBinder.Eval(Container.DataItem, "OrderSummaryProductCode") %></td>
<td>
< asp:TextBox AutoPostBack="false" id="txtQty" style="width:25px;" Text='<%# DataBinder.Eval(Container.DataItem, "OrderSummaryProductQuantity") %>' runat="server" MaxLength="2" / ></td>
<td>$<%# DataBinder.Eval(Container.DataItem, "OrderSummaryProductCost") %></td>
<td>$<%# DataBinder.Eval(Container.DataItem, "OrderSummaryProductTotal") %></td>
<td></td>
</tr>
< /ItemTemplate >
< /asp:Repeater >

and this is the btnUpdate click event for a single button that should update my dataset

private void btnUpdateCart_Click(object sender, System.EventArgs e)
{
foreach(RepeaterItem item in cartItems.Items)
{
TextBox qtyCtrl = (TextBox)item.FindControl("txtQty");
HtmlInputHidden codeCtrl = (HtmlInputHidden)item.FindControl("code");

try
{
int qty = Int32.Parse(qtyCtrl.Text);
string code = codeCtrl.Value;
BasicCart cart = (BasicCart)Session["cart"];
cart.SetQuantity(code, qty);
} catch { /* TODO : fix this */ }
}
}

when i step i through the code, qty is the value before i change it in the form.

any ideas please ?, sorry about formatting, couldnt get it to preformat with tags

kind regards,
g00fy

analytiks22-Dec-05 19:33

22-Dec-05 19:33

I believe you will have to bind the updated datasource again to get the updates reflected since the data are being set by binding it to the control.

jpeg image DPI property

MichaelBlane21-Dec-05 8:17

MichaelBlane

21-Dec-05 8:17

Is there a way to display the DPI (bitdepth) property of an image file such that it can be captured or displayed?

Okay, now the background of this:
I'm working on scanning family historical photos at home and, as part of the photo information, I want to capture what DPI I scanned the photos at. Some are 300 DPI, some 600 DPI, etc. I don't want to have to check the property page for each image (there are now ~600 images in the collection). I'd like to generate a way to do this via javascript/vbscript if possible, so that I can gather other information while writing the information to the database. I'd also like to keep the number of dependant programs to a minimum.

Thanks,
-m

ASP.NET and JAVASCRIPT

MinaFawzi20-Dec-05 22:35

20-Dec-05 22:35

hi all
i created a list using javascript rollover, and i want the user when click on one item in this list to call an ASP.NET event which will update a datagrid,i am using asp.net verison 1.1 .

Thanks.

MiNa

enjoycrack21-Dec-05 7:03

enjoycrack

21-Dec-05 7:03

Hi there,

IMO, you might have a look at AJAX.

<< >>

MinaFawzi21-Dec-05 22:23

21-Dec-05 22:23

when i search fro it i found that it is supported to asp.net vertsion 2.0, i need something work fpr version 1.1

Thanks

MiNa

analytiks22-Dec-05 1:12

22-Dec-05 1:12

i believe you want to invoke a post back from javascript so that you can process the datagrid updation in the code behind ~ if this is it then what you can do is have a hidden ASP Button in the aspx page ~ say 'btnA' ~ call the js function below ~ this will cause a post back for btnA click event ~ in the btnA's click handler you can write the datagrid updation code

function submitdatatoserver()
{
var theform;
if (window.navigator.appName.toLowerCase().indexOf("netscape") > -1) {
theform = document.forms["form1"];
}
else
{
theform = document.form1;
}
theform.__EVENTTARGET.value = 'btnA'.split("$").join(":");
theform.__EVENTARGUMENT.value = '';
theform.submit();
}

-- modified at 7:14 Thursday 22nd December, 2005

MinaFawzi22-Dec-05 5:02

22-Dec-05 5:02

i will try it, it may solve my problem Smile | :)

, but can anyone plz discuss this code and explain it to me

MiNa

analytiks22-Dec-05 19:28

22-Dec-05 19:28

When the postdatatoserver function, it programmatically submits the form to the server by calling submit on the DHTML object specified in the __EVENTTARGET element. you can also check this out this way. Put a textbox in your form, set AutoPostback to true, and have an event handler for the textchanged event of textbox. When the page is rendered in the browser, do a ViewSource, in the source you will find a code similar to

function __doPostBack(eventTarget, eventArgument) {
var theform = document._ctl0;
theform.__EVENTTARGET.value = eventTarget;
theform.__EVENTARGUMENT.value = eventArgument;
theform.submit();
}

MinaFawzi24-Dec-05 3:36

24-Dec-05 3:36

i tried this solution in a simple test application ,but i didnt work Frown | :(

i created a button and set the visible property of it to false and its name was Button1
then i add an image and link the onclick event of it to this function, but when i click on the image there is an error occured : error :'__EVENTTARGET" is null or not an object
all what i modify is the btnA to button1

MiNa

analytiks25-Dec-05 2:38

25-Dec-05 2:38

that is because the __EVENTTARGET is a html hidden field. it is not present in your page ~ add it to your .aspx file ~ but be sure that there are not more than 1 __EVENTTARGET fields in your form ~ if there are more than 1, it will not work ~ when autopostback properties of controls like textbox, datagrid, datalist etc are set to true, the __EVENTTARGET is generated automatically and in that case u will have to remove the __EVENTTARGET field that you had added in the .aspx page.

MinaFawzi25-Dec-05 13:31

25-Dec-05 13:31

thanks man
i add an iage to my form
and here is what is generated in the html code page :

then i add the function between the script tag after the form tag :
function submitdatatoserver()
{
var theform;
if(window.navigator.appName.toLowerCase().indexOf("microsoft") > -1)
{
theform = document.forms["form1"];
}
else
{
theform = document.form1;
}
theform.__EVENTTARGET.value = 'Button1'.split("$").join(":");
theform.__EVENTARGUMENT.value = '';
theform.submit();

}

and i write all what i want to update in the button1 event, and still having the same error .
plzz help

MiNa

-- modified at 19:35 Sunday 25th December, 2005