Re: How to raise events while clicking a datalist item or a particular Row?? - ASP.NET Discussion Boards

How to raise events while clicking a datalist item or a particular Row??

bijeshputhalath15-Aug-07 21:40

15-Aug-07 21:40

Hai,
I am using dotnetFramework1.1 with C# coding for my project.
I need to display some Records.So i use DataList Control For that...But my Problem is that when I click a particular row ,i want to redirect to some other page showing the full description of that particular record.How is this possible????....Please hepl me to solve my proble....
thanks in advance
Bijesh

Re: How to raise events while clicking a datalist item or a particular Row??

Michael Sync15-Aug-07 21:59

Michael Sync

15-Aug-07 21:59

Use Template Column in DataList control. Put the LinkControl in that template column.

OR

<a href="http://mysite/anotherpage.aspx?id=1" > <%# DataBinder.Eval(Container.DataItem,"fieldName") %></a>

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

If you want to thank me for my help, please vote my message by clicking one of numbers beside "Rate this message". Why vote? Plz Read it here. Thank you.

Re: How to raise events while clicking a datalist item or a particular Row??

bijeshputhalath15-Aug-07 23:35

bijeshputhalath

15-Aug-07 23:35

Hello,
i am new to asp.net.....By using "id=1" in query string How we can recognize each different recods data....I try this but some error comes....any modification need my code.......

<%# DataBinder.Eval(Container.DataItem,"fieldName") %>

--------------------------------------------------------------------------

>
<asp:button
="" style="display:none;" commandargument="<%# DataBinder.Eval(Container.DataItem,"AD_TITLE")%>" id="HiddenButton" runat="server" text="View">

<%# DataBinder.Eval(Container.DataItem,"AD_TITLE") %>

<%# DataBinder.Eval(Container.DataItem,"AD_TYPE") %>

<%# DataBinder.Eval(Container.DataItem,"AD_DESCRIPTION") %>

Price:
<%# DataBinder.Eval(Container.DataItem,"PRICE") %>

Location:
<%# DataBinder.Eval(Container.DataItem,"LOCATION") %>

this is the code what i used or please help me by using template column link control.....
thanks in advance

Re: How to raise events while clicking a datalist item or a particular Row??

Michael Sync15-Aug-07 23:51

Michael Sync

15-Aug-07 23:51

<a href="http://mysite/anotherpage.aspx?id=<%# DataBinder.Eval(Container.DataItem,"fieldName") %>" > <%# DataBinder.Eval(Container.DataItem,"fieldName") %></a>

bijeshputhalath wrote:
please help me by using template column link control.....

<asp:DataList id="DataList1" style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 8px" runat="server"><br />
				<ItemTemplate><br />
					<asp:HyperLink id="HyperLink1" runat="server" NavigateUrl="<%# DataBinder.Eval(Container.DataItem,"fieldName") %>"><%# DataBinder.Eval(Container.DataItem,"fieldName") %></asp:HyperLink><br />
				</ItemTemplate><br />
			</asp:DataList>

Re: How to raise events while clicking a datalist item or a particular Row??

bijeshputhalath16-Aug-07 1:21

bijeshputhalath

16-Aug-07 1:21

Hello,

Thank you so much....i use the first method.....it is working fine.....But in my query string, i send 3 parameters(Becoz if i send only one parameter if any records with same data i,it will display the first record)...But i cant retrieve it all the three and getting some error .

----------------------------------------------------------------------------
i used the following code in html

>
<asp:button
="" style="display:none;" commandargument="<%# DataBinder.Eval(Container.DataItem,"AD_TITLE")%>" id="HiddenButton" runat="server" text="View">

,price=<%# DataBinder.Eval(Container.DataItem,"PRICE") %>,type=<%# DataBinder.Eval(Container.DataItem,"AD_TYPE") %>">
<%# DataBinder.Eval(Container.DataItem,"AD_TITLE") %>

<%# DataBinder.Eval(Container.DataItem,"AD_TYPE") %>

<%# DataBinder.Eval(Container.DataItem,"AD_DESCRIPTION") %>

Price:
<%# DataBinder.Eval(Container.DataItem,"PRICE") %>

Location:
<%# DataBinder.Eval(Container.DataItem,"LOCATION") %>

----------------------------------------------------------------------------
and in my target page i use

string search,type1,price;

search=Request.QueryString["li"].ToString();
type1=Request.QueryString["type"].ToString();
price=Request.QueryString["price"].ToString();
Label1.Text=search;
string sstr="select * FROM ads where AD_TITLE='"+search+"' && PRICE='"+price+"' && AD_TYPE='"+type1+"'";
sdr=conobj.reader(sstr);
----------------------------------------------------------------------------
But i get the following error

Server Error in '/approvedplotfinal' Application.
--------------------------------------------------------------------------------

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 45:
Line 46: search=Request.QueryString["li"].ToString();
Line 47: type1=Request.QueryString["type"].ToString();
Line 48: price=Request.QueryString["price"].ToString();
Line 49: Label1.Text=search;

----------------------------------------------------------------------------
Please help me to trace out.......
thanks again....
Biju

Re: How to raise events while clicking a datalist item or a particular Row??

Michael Sync16-Aug-07 1:27

Michael Sync

16-Aug-07 1:27

When you are posting the HTML code, please check "Ignore HTML tags in this message". otherwise, all code will be strips off..

Can you post your code again?

Re: How to raise events while clicking a datalist item or a particular Row??

bijeshputhalath16-Aug-07 2:41

bijeshputhalath

16-Aug-07 2:41

this the target page URL:::

"http://localhost/approvedplotfinal/classified/AddView.aspx?li=search%20of%20a%20new%20plot,type=Wanted,price=5000"

My target page code like this-----------------------------------------------------------------------------
string search,type1,price;
//Session["li"].ToString();

search=Request.QueryString["li"].ToString();
type1=Request.QueryString["type"].ToString();
price=Request.QueryString["price"].ToString();
Label1.Text=search;
string sstr="select * FROM ads where AD_TITLE='"+search+"'&& AD_TYPE='"+type1+"' && PRICE='"+price+"' ";
sdr=conobj.reader(sstr);
while(sdr.Read())
{
}
----------------------------------------------------------------------------

This is the htmal part

<ItemTemplate>

<tr <%# TRJavaScript(Container) %> >
<td><asp:Button
style="display:none;"
CommandArgument='<%# DataBinder.Eval(Container.DataItem,"AD_TITLE")%>'
ID="HiddenButton" Runat="server" Text="View">
</asp:Button>

<a href="http://localhost/approvedplotfinal/classified/AddView.aspx?li=<%#DataBinder.Eval(Container.DataItem,"AD_TITLE") %>,type=<%# DataBinder.Eval(Container.DataItem,"AD_TYPE") %>,price=<%# DataBinder.Eval(Container.DataItem,"PRICE") %>">
<%# DataBinder.Eval(Container.DataItem,"AD_TITLE") %>
</a>
<%# DataBinder.Eval(Container.DataItem,"AD_TYPE") %>
<br>
<%# DataBinder.Eval(Container.DataItem,"AD_DESCRIPTION") %>
<br>
Price:
<%# DataBinder.Eval(Container.DataItem,"PRICE") %>
<br>
Location:
<%# DataBinder.Eval(Container.DataItem,"LOCATION") %>
<br>
</tr>
</ItemTemplate>
----------------------------------------------------------------------------
please help.....
i need to hit a target page with these parameters ....
thanks
Biju

Re: How to raise events while clicking a datalist item or a particular Row??

Michael Sync16-Aug-07 4:18

Michael Sync

16-Aug-07 4:18

bijeshputhalath wrote:
li=<%#DataBinder.Eval(Container.DataItem,"AD_TITLE") %>,type=<%# DataBinder.Eval(Container.DataItem,"AD_TYPE") %>,price=<%# DataBinder.Eval(Container.DataItem,"PRICE")

should be "&" (not ",") eg: http://myurl.com/page1.aspx?a=1&b=2&c=3

Re: How to raise events while clicking a datalist item or a particular Row??

bijeshputhalath16-Aug-07 5:30

bijeshputhalath

16-Aug-07 5:30

Hello ,

I try with "&" also Before your suggetion with & operator....But the same error comes still.....
my problem is that...How can i retrieve each query string value

li=<%#DataBinder.Eval(Container.DataItem,"AD_TITLE") %>&type=<%# DataBinder.Eval(Container.DataItem,"AD_TYPE") %>&price=<%# DataBinder.Eval(Container.DataItem,"PRICE")

With these coding ,it will work or not????

string search,type1,price;

search=Request.QueryString["li"].ToString();
type1=Request.QueryString["type"].ToString();
price=Request.QueryString["price"].ToString();
Label1.Text=search;
string sstr="select * FROM ads where AD_TITLE='"+search+"'&& AD_TYPE='"+type1+"' && PRICE='"+price+"' ";
sdr=conobj.reader(sstr);
while(sdr.Read())
{
}

what is my mistake ...????Please help me....
with regards and thanks
Biju

Re: How to raise events while clicking a datalist item or a particular Row??

Michael Sync16-Aug-07 6:33

Michael Sync

16-Aug-07 6:33

Okay. Lets debug the application..

Let's say we have two pages called page1 and page2. We will divide the issue into small pieces ~
1. Using static data in page1
2. Retrieving the data in page2
3. Checking whether the SQL statment is correct or not
4. Changing static data to dynamic data in page1.

1. Using static data in page1

We will remove all dynamic value in A link to avoid NULL value and "".

Note: dynamic value means <%# DataBinder.Eval(Container.DataItem,"AD_TYPE") %>.

<a  href="http://localhost/approvedplotfinal/classified/page2.aspx?li=<%#DataBinder.Eval(Container.DataItem,"AD_TITLE") %>,type=<%# DataBinder.Eval(Container.DataItem,"AD_TYPE") %>,price=<%# DataBinder.Eval(Container.DataItem,"PRICE") %>"><br />
                        <%# DataBinder.Eval(Container.DataItem,"AD_TITLE") %><br />
</a><br />

We will replace all dynamic value with all static value.

<br />
<a  href="http://localhost/approvedplotfinal/classified/page2.aspx?li=mytitle&type=mytype&price=100" ><br />
     <%# DataBinder.Eval(Container.DataItem,"AD_TITLE") %><br />
                    </a>

Run the application to check whether there is any error or not.

2. Retrieving the data in page2

Forget about other code in page2. We will assume that we have only the following lines in Page Load.

search=Request.QueryString["li"].ToString();
type1=Request.QueryString["type"].ToString();
price=Request.QueryString["price"].ToString();

- Set the breakpoint at "search" variable.
- Run the application. (Page1 is start-up page)
- Click the link in page1. (it will take you to page2.)
- Check whether "Request.QueryString["li"]" is null or not.
- Check whether "Request.QueryString["type"]" is null or not.
- Check whether "Request.QueryString["price"]" is null or not.

Note: All three parameters should not be NULL. If you are getting NULL then let me know.

3. Checking whether the SQL statment is correct or not

Which Database are you using? If it's SQL Server, you don't need "&&".

string sstr="select * FROM ads where AD_TITLE='"+search+"'&& AD_TYPE='"+type1+"' && PRICE='"+price+"' ";<br />

So, we will change something like that.

string sstr="select * FROM ads where AD_TITLE='" + search + "' AND AD_TYPE = '" + type1 + "'     AND PRICE='"+ price + "'";<br />

- Check this variable "sstr" in Quick Watch or Immediate Window.
- Copy the string from Quick Watch or Immediate Window.
- Paste in Query Analyzer and Run it.
(You should not get any error. this is about checking whether the SQL statement is correct or not.)

4. Changing static data to dynamic data in page1.

It is still working fine. we will remove the static code in page and replace with dynamic code.
So, the following code will be used again..

<a  href="http://localhost/approvedplotfinal/classified/page2.aspx?li=<%#DataBinder.Eval(Container.DataItem,"AD_TITLE") %>,type=<%# DataBinder.Eval(Container.DataItem,"AD_TYPE") %>,price=<%# DataBinder.Eval(Container.DataItem,"PRICE") %>"><br />
                        <%# DataBinder.Eval(Container.DataItem,"AD_TITLE") %><br />
</a><br />

- Run the application
- Click the link in page1.
- Check the Request.QueryString and SQL Statement in page2.

if it's working until now, you are done.. Smile | :)

Please follow the step as I mention here.. let me know the result..

Re: How to raise events while clicking a datalist item or a particular Row??

bijeshputhalath16-Aug-07 19:25

bijeshputhalath

16-Aug-07 19:25

Hai,
sorry for delay...
It is very helpful....i done as per your information...it is working fine Now my problem solved...Thanks alot.....But Now arise a new problem..How to set paging in this.???...Please give any idea or sample code.....

instead of "," i use '&'in this code......it is very helpful
-----------------------------------------------------------------------------
<a href="http://localhost/approvedplotfinal/classified/page2.aspx?li=<%#DataBinder.Eval(Container.DataItem,"AD_TITLE") %>,type=<%# DataBinder.Eval(Container.DataItem,"AD_TYPE") %>,price=<%# DataBinder.Eval(Container.DataItem,"PRICE") %>">
<%# DataBinder.Eval(Container.DataItem,"AD_TITLE") %>
</a>
-----------------------------------------------------------------------------
thanks once again
Biju

Re: How to raise events while clicking a datalist item or a particular Row??

Michael Sync16-Aug-07 20:09

Michael Sync

16-Aug-07 20:09

bijeshputhalath wrote:
It is very helpful.

It is helpful for you. Please don't forget to vote the message. Smile | :)

Thanks.

bijeshputhalath wrote:
.How to set paging in this.???...Please give any idea or sample code.....

You can google about there are a lot of helpful codes for this.

Ask the DotNetJunkies: DataList Paging[^]

Implementing Paging in a DataList Control...[^]

Feel free to let me know if you have any problem in implementing.

Re: How to raise events while clicking a datalist item or a particular Row??

bijeshputhalath16-Aug-07 23:39

bijeshputhalath

16-Aug-07 23:39

Hai

How to edit and update a particular DataList item??
Thanks and regards
Biju

Re: How to raise events while clicking a datalist item or a particular Row??

Michael Sync16-Aug-07 23:48

Michael Sync

16-Aug-07 23:48

bijeshputhalath wrote:
How to edit and update a particular DataList item??

If you wanna do inserting, editing and deleting the record, I would suggest you to use "DataGrid" or "GridView" control instead of "DataList".

photo gallery (urgent!)

Milind Panchal15-Aug-07 21:34

Milind Panchal

15-Aug-07 21:34

Hi,

I am developed a application as multiple image uploading.

I browse the image and add path of this in listbox.then click on upload button to upload the images. So I want to create thmbnail images on web page while adding the images paths to the listbox.

thanks Confused | :confused:

Re: photo gallery (urgent!)

N a v a n e e t h15-Aug-07 21:40

N a v a n e e t h

15-Aug-07 21:40

tulsulkar wrote:
create thmbnail images on web page while adding the images paths to the listbox.

Use GetThumbnail() method in Image class

My Website | Ask smart questions

Re: photo gallery (urgent!)

Milind Panchal15-Aug-07 21:42

Milind Panchal

15-Aug-07 21:42

can you send me code

Re: photo gallery (urgent!)

Michael Sync15-Aug-07 22:02

Michael Sync

15-Aug-07 22:02

Sure.

How To: Creating Thumbnail Images

<br />
// create an image object, using the filename we just retrieved<br />
        System.Drawing.Image image = System.Drawing.Image.FromFile(Server.MapPath(file));<br />
<br />
        // create the actual thumbnail image<br />
        System.Drawing.Image thumbnailImage = image.GetThumbnailImage(64, 64, new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback), IntPtr.Zero);<br />

how do i Filter extensions in FileUpload Control

Amit.Amit.Amit...15-Aug-07 21:22

Amit.Amit.Amit...

15-Aug-07 21:22

Hi Friends,

i m using FileUpload Control in my page

now i want, user not able to upload .exe file

for that i need to specify filter fo extensions

how do i Filter extensions???

thanks

Amit Metkar
3i-infotech, Mumbai.

Re: how do i Filter extensions in FileUpload Control

Michael Sync15-Aug-07 21:25

Michael Sync

15-Aug-07 21:25

No. AFAIK, it's not possible to do that with File Upload control. maybe. you may look around flash or ActiveX control.. I'm sure that HTML file control doesn't have that feature. So, you will have to check the extension at code-behind.

Re: how do i Filter extensions in FileUpload Control

N a v a n e e t h15-Aug-07 21:33

N a v a n e e t h

15-Aug-07 21:33

Amit.Amit.Amit..... wrote:
now i want, user not able to upload .exe file

for that i need to specify filter fo extensions

Specifying filter is not possible in file upload control. But you can check the file extension like this and alert user regarding that

if (File1.PostedFile.FileName.EndsWith(".exe"))
{
    //Display message
}
else
    //Upload

My Website | Ask smart questions

Re: how do i Filter extensions in FileUpload Control

metallica_rock1015-Aug-07 23:09

metallica_rock10

15-Aug-07 23:09

Use javascript for the validations since u cant filter the HtmlInputFile control.

Ask if u want the code u have 2 do it in the onchange method.

Re: how do i Filter extensions in FileUpload Control

metallica_rock1015-Aug-07 23:09

metallica_rock10

15-Aug-07 23:09

Use javascript for the validations since u cant filter the HtmlInputFile control.

Ask if u want the code. u have 2 do it in the onchange method.

Re: how do i Filter extensions in FileUpload Control

mangrovecm15-Aug-07 23:52

mangrovecm

15-Aug-07 23:52

you should use this code:

private bool IsAccept(string fileName)
{
bool ok = false;
string ext = System.IO.Path.GetExtension(fileName);
if (ext == ".jpe" || ext == ".jpeg" || ext == ".pjpeg" || ext == ".gif"
|| ext == ".jpg" || ext == ".bmp" || ext == ".png" || ext == ".x-png")
{
ok = true;
}
return ok;
}

Hope that help you!

vtkiet05

Re: how do i Filter extensions in FileUpload Control

Christian Graus15-Aug-07 23:26

Christian Graus

15-Aug-07 23:26

javascript cannot interact with the input control, or the file system, AFAIK.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.