Re: Dropdownlist control problem - ASP.NET Discussion Boards

Dear all,

Im new in this and hope to get some advice.

I want to build a webservice that has to get some data as parameter from the client application. the data from the client side are records from there database.
my websercie has to send then these data to a soap server through 'HttpWebRequest'.
Can i get the data as Datatable? and then send as stream to the soap server?
Or maybe there is a better easier ways? your suggestion please

Thanks in advance.

A datatable is going to add a lot of overhead. I would suggest creating a class that represents the stuff you have in a row. That would then be a parameter of your web service. Those are known as "complex types" in the web services world. How you send it on after that depends on what is on the receiving end. Just saying it is SOAP doesn't give enough detail to say what kind of format it would accept. Are you doing anything with the data on the web server before you send it on? It seems like you are adding a middle man for no reason.

Hi T M Gray,

Thank you for reply!

By creating a class that represents the stuff in a row, the client app has to send then each record separately, so they have to call the webservice once for each record. Don't we have this way more overhead then sending the entire datatable at once?
And yes the webservice is acting as middle man between internet and the soap server for security reasons. the webservice has to send the data as string to that soap server.

Hi, all,

I have a gridview table with some columns vertical orientated, but after export to excel, all the column headers are horizontal, how can I keep the same format as gridview?

Also set the header row height after exported to excel?

Thanks!

Hi, all,

I have a gridview with sorting header, after I export it to excel, the links are still there, how can I remove the sort link?

I search the internet, somebody suggest using the following codes in Export_Click method:

GridView1.AllowSorting = false;
GridView1.DataBind();

But after I use this, the generated excel file have no data at all, only some html codes line

....

.

Can anybody help me? Thanks!

Solved.

Thanks!

Dear Friends,

I have three dropdownlist controls. When the page loads, first dropdownlist is filled and the remaining two are empty. When I select some value in First dropdownlist then corresponding values to be populated in Second dropdownlist and same When I select some value in Second dropdownlist then corresponding values to be populated in Third dropdownlist. The problem is, Whatever I select in the First dropdownlist automatically the first item only getting selected. Even If I selected the 5th Item, then also the First Item only getting selected. Please solve my problem.

Thanks & Regards,
Dileep.

Here is a simple example concerning updating derop
down list based on selction in another drop down ...

<%@ Page Language="C#" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01
 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<script runat="server">
    protected void Button1_Click(object sender, EventArgs e)
    {
     
                 DropDownList1.Items.Clear();
        String[] ds = {"hi RED","sup RED"};
        String[] ds1 = { "hi BLUE", "sup BLUE" };
        if (DropDownList2.SelectedValue == "RED")
        {
            DropDownList1.DataSource = ds;
            DropDownList1.DataBind();
         }
       if (DropDownList2.SelectedValue == "BLUE")
        {
            DropDownList1.DataSource = ds1;
            DropDownList1.DataBind();
        }
     }
        </script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Untitled Page</title>
    <style type="text/css">
    #UpdatePanel1 {       width:300px; height:100px;     }    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div style="padding-top: 10px">
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                <fieldset>
                <legend>UpdatePanel</legend>
                    <asp:DropDownList ID="DropDownList1" runat="server">
                    </asp:DropDownList>
                    <asp:DropDownList ID="DropDownList2" runat="server">
                    <asp:ListItem>RED</asp:ListItem>
                    <asp:ListItem>BLUE</asp:ListItem>
                    </asp:DropDownList>
                <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
                </fieldset>
            </ContentTemplate>
        </asp:UpdatePanel>
        <br />
        </div>
        </div>
    </form>
</body>
</html>

Your description doesn't tell me much about the cause of your problem. Could you post some code, so that we may be able to help you.

..Go Green..

Are you binding the dropdown in page_load event. If so is it within if(!Ispostback) ?

I think thats the problem you did not bind the dropdown within if(!Ispostback)

I think this may help u............. Smile | :)

Your problem could it be like sandympatil said! or maybe you're setting the same dropDownList1.DataValueField in the data source...
for example I have as source:

-column1----column2
---------------------
-red------------value1
-blue-----------value1
-orange-------value1
-black----------value1

and dropdownlist is
dropDownList1.DataTextField = "column1";
dropDownList1.DataValueField = "column2";

look out that. If that's so, the post back always select the first option with 'value1'... Ahh! I recommend you to use ajax CascaddingDropDownList Here!![^]

Hi guys, am trying to empty my datagrid before i bind new records(items)
I tried the following but they won't work:

myDataGrid.DataSource = null;
myDataGrid.DataBind();
or
myDataGrid.Dispose();

Even if you empty your grid it'll populate with the new records.then Why you want to empty datagrid before binding with new records?

Arun Jacob
http://codepronet.blogspot.com/

From the example program in my reply
to cheguri ...

DropDownList1.Items.Clear();

Try this :

<br />
DataTable dt = new DataTable;<br />
myDataGrid.DataSource = dt;<br />

I have one web page with 4 RadioButtonList controls and some panels.

I want to view specific panel content depending on radio buttons.

For example,

RadioButtonList1 (RBL1) contains 3 radio buttons.
each radio button will show one another RadioButtonList Control.

And each radiobutton of other RadioButtonLists will show correcsponding panels.

I have done this one in normal code behind concept. When I add Update Panel control, it doesn't work in Google Chrome.

Please give me a help.

Hi Experts,

I have designed and coded all my report pages.As my data is more then 500 charactres in one of my fied, the entry directly goes to second page and the first page remains blank as i have a page header covering 1/4th space in my first page....

Thus i wanted to have data on first page also and continue the remaining data on second page....Is there any property that i m forgetting to assign ?

Please Help. Cry | :((

Sharing Of Knowledge Provides Solution....

Hi guys, i have a datagrid with a check box.
when user clicks 'Delete' button, then all the rows
where a checkbox is checked should be deleted.
here is what i have tried and suprisingly only the first selected row get
deleted and the rest are ignored

CheckBox delSel;
for (int i = 0; i < contacts.Items.Count; i++)
{
   delSel = (CheckBox)contacts.Items[i].Cells[1].FindControl("delSelection");
   if (delSel.Checked)
   {
      string contactId = contacts.Items[i].Cells[0].Text;
      string delet = manager.DeleteContact(contactId);//get response after deleting from database
   }
}

Please help if you know how i can delete all checked rows(contacts)
Thanks,
Morg

It should delete all the selected rows.Try to debug it you will get to know the reason.There might b some problem in logic.

After deleting all the rows bind your grid with fresh data again.

Cheers!!
Brij
Check my latest Article :Exploring ASP.NET Validators

Ya managed to fix it...really just logic wasted my 3hours.
I was calling a method to update my datagrid within the forloop,
to mean when it loops once i call the method to update datagrid
hence my selected/checked items get refreshed and lost.
So irritating D'Oh! | :doh:

Anyway thanks for your help

it happens sometimes Smile | :)

Cheers!!
Brij
Check my latest Article :Exploring ASP.NET Validators

DataGridDemo[^]
Look at the section Checkboxes and TextBoxes

I know the language. I've read a book. - _Madmatt

hi,
currently i m working in asp.net 2.0 (2005).
1st time i m using the previousPage process.i tried to retrive a hidden variable (source page) value to my destination page.

1. i set the PostBackURl as my destination page on the button click on source page
2. i put the following coding in the destination onload event.

if ((PreviousPage != null) && (PreviousPage.IsCrossPagePostBack))
            Label1.Text = System generated ID : " + Convert.ToString(PreviousPage.FindControl("HidTest"));

but always the PreviousPage is null and not coming inside the loop.

help me please - Karan

Hi,

you say PreviousPage is always null. When is the code you posted actually run? If it is on a postback,
PreviousPage is null, because there is no PreviousPage then. You should save the value
in a "If(!IsPostback)" part of your page load.

This is just a guess i'm afraid.

Good Luck

Hello friends,

I have created a report which uses CSS to set back-ground image a text box. When I run the report using ASP.NET CrystalReportViewer, the CSS formatting was applied but when I tried to print the report, the CSS formatting was not applied.

I am using Crystal Report for Visual Studio .NET 2005.

Please help me in solving this issue.

Shivanandan C V