Re: remove items from Listbox - C# Discussion Boards

9-Sep-12 4:38

I have 2 listboxs. 1st one is data bound and secound one is populated by selecting 1st.
eg:
listbox1
jenny
rock
when i click listbox 1 items it also appear in listbox2. now when i click listbox1 item 2 things happen:
1. listbox2 populates with same item selected in listbox1.
2. a textbox which gets valueid from listbox1 item select.

So now, when i try to remove item from listbox2 then itm should be removed from the list and the valueid in textbox related to the item should also be removed.

I have tried o do this by selecteditem property of listbox but it didn't work. since listbox1 is data bound but listbox2 is not.

Eddy Vluggen9-Sep-12 5:39

9-Sep-12 5:39

Unless I did not correctly understand your question, something like below should work;

Listbox2.Items[1].Remove(); // deletes "jenny"

Bastard Programmer from Hell Suspicious | :suss:

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scottichrosaviakosmos9-Sep-12 5:55

9-Sep-12 5:55

ok, but what about valueid which is populated when i add items in lstbox2 from listbox1.
i have a button "ADD". when i select item in listbox1 and click add button item is added to listbox2 and so as its valueid in textbox. but when i click on remove button the item will get removed from listbox2 but valuid for that item is removed from textbox. This is because listbox2 is not databound and valueid is generated from listbox1.

Eddy Vluggen9-Sep-12 5:57

9-Sep-12 5:57

scottichrosaviakosmos wrote:
and valueid is generated from listbox1.

At what time? Easiest solution would be to call that generate-routine again, otherwise you'd have to manually cut it from the string, before deleting the item.

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scottichrosaviakosmos9-Sep-12 9:07

9-Sep-12 9:07

Ok, let me explain in details.

I have a form which has 2 listboxs, textbox and 2 buttons.

lst1 and lst2. Also has 2 buttons "add" and "Remove".

lst1 is populated from a database table which has 2 fields : "Name" ad "emailid".

lst1 will show items "name" from table column "name". eg: ronny, danial...

when i select an item(name) in lst1 and click Add button then the name will be added in lst2(lst2 is not connected to datasource). Also the displayvalue member or emailid with respect to the name selected in lst1 will be added to the textbox.(this is working fine).

Now, when i select an item in lst2 which was added from lst1 and then click on Remove button then the item(name) should be removed from lst2(this is also working fine) and also the emailid corresponding to the value(name) selected in lst2 should be removed from textbox.

emailid on selectitem of lst2 is not getting removes since the lst2 is connected to database. lst is adding its item from lst1.

I hope now the scenario is clear.! Hmmm | :|

Cheers

Eddy Vluggen9-Sep-12 21:32

9-Sep-12 21:32

scottichrosaviakosmos wrote:
Now, when i select an item in lst2 which was added from lst1 and then click on Remove button then the item(name) should be removed from lst2(this is also working fine) and also the emailid corresponding to the value(name) selected in lst2 should be removed from textbox.

So, everything is working fine, except for the removal of the email-address in the textbox?

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scottichrosaviakosmos12-Sep-12 20:55

12-Sep-12 20:55

yes.

Eddy Vluggen12-Sep-12 21:17

how to find all elements of a webpage

12-Sep-12 21:17

..and the email-address needs to be removed from the textbox, if the "remove" button is clicked?

Emailaddresses are unique, so you could try and replace that part of the textbox with an empty string, like so;

textBox1.Text = textBox1.Text.Replace("et@home.nl", "");

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hosseinDolat9-Sep-12 1:09

hosseinDolat

9-Sep-12 1:09

Hello guys. I am using C# code to download a webpage, namely the image searching page of google with this URL: http://images.google.com/[^]
But the problem is the code is not saving the whole elements of the webpage. I tried to save the page by file->save but I am still not able to see some elements like the camera picture in the search box.
the code that I am using to save the page is:

string pageURL = txbURL.Text;
string pageContent = DownloadPage(pageURL);
System.IO.File.WriteAllText("WebPage.html", pageContent);

does anyone know what is happening for the hidden elements of webpage?
thanks and regards

jschell9-Sep-12 4:04

jschell

9-Sep-12 4:04

Just to be clear - you understand that a image file will not be in the string right? So at best your html file can only have a link to the image?

Other than that I suggest you actually look at the html using a browser, save it, and then compare it to what you saved in your file.

hosseinDolat9-Sep-12 15:53

hosseinDolat

9-Sep-12 15:53

Thanks for your answer. I know this but the problem is the webpage that I want to download. It is the image search of google. www.image.google.com
As it can be seen, there is a small camera icon beside the search button. When I save the page, this icon will not apear in the saved page.

jschell10-Sep-12 8:48

jschell

10-Sep-12 8:48

Did you are did you not use your browser (not your code) to save the source of that link to a file?

Once you did that, did the icon show up or not?

hosseinDolat10-Sep-12 14:36

hosseinDolat

10-Sep-12 14:36

Hi and thanks for your reply. I saved the page with IE but the button is not there. I just tried to save the page with mozila firefox. It downloads all of the icons and also the icon for the camera that I need, but still when I open the saved page using dreamweaver I am not able to see the icon. I need to find it because I want to change it by the code.

Datagridview Empty space Click Events

jschell11-Sep-12 8:28

jschell

11-Sep-12 8:28

hosseinDolat wrote:
It downloads all of the icons and also the icon for the camera that I need

Again...that is NOT possible in the context of your original question.

You CANNOT put an icon into a string.

So either it stored the text (string) of html, with the links or it saved a tree (one or more files some of which are icons.)

So your steps are
1. FIRST identify exactly what is that you think that you need to download
2. Fix DownloadPage() do to that.

mohammadkaab9-Sep-12 0:57

mohammadkaab

9-Sep-12 0:57

hi guys , i'm wondering if we have an event for a clicking on the space of the datagridview . i mean , let guess we have 5 rows in the datagridview then after the last row there is still a space from the bottom of the datagridview to the last row .
i want to know if we have an event for that empty place(space) , noticed(i dont want to click the cells ) i just wanna a click events for the empty place .so if i clicked the empty space on the datagridview sth w'll happend.
&
i have used the click and mouse click events but they do double thing , that mean if you click on the row they'll work and also on the empty space .

i hope you get what i mean ?

Re: Datagridview Empty space Click Events

Alan N9-Sep-12 3:19

Alan N

9-Sep-12 3:19

You'll have to use the HitTest method to get a HitTestInfo object containing information about the DataGridView element existing at the clicked mouse coordinates.

There are two ways to tell if the blank area beneath the rows was clicked. Both are shown in the code fragment.

private void dgv_MouseClick(object sender, MouseEventArgs e) {
  // Use Type property ( == Nothing for the blank area)
  Debug.Print("{0}", dgv.HitTest(e.X, e.Y).Type);

  // Use static value Nowhere
  Debug.Print("MouseClick was Nowhere {0}", dgv.HitTest(e.X, e.Y) == DataGridView.HitTestInfo.Nowhere);
}

Alan.

Windows 7 Files Explorer - New Folder In Tree

fakir4458-Sep-12 22:57

fakir445

8-Sep-12 22:57

Hello

In Windows 7, files explorer tree, we have default locations:

- Favorites
- Libraries
- Computer
- Network

Question:

I need create my new location in explorer tree
Target effect:

- Favorites
- My_Folder ( loctaion: D:\My_Folder - with my icon )
- Libraries
- Computer
- Network

This is possible in C# ?
What I need to start ?

Thank You
Mark

Eddy Vluggen9-Sep-12 0:29

9-Sep-12 0:29

mt1024 wrote:
In Windows 7, files explorer tree, we have default locations:

- Favorites

- Libraries

- Computer

- Network

If you're referring to the default save location in a save-dialog, check this[^] out. If not, please post a screenshot to clarify Smile | :)

Bastard Programmer from Hell Suspicious | :suss:

if you can't read my code, try converting it here[^]

fakir4459-Sep-12 5:14

fakir445

9-Sep-12 5:14

Example

http://4096.strefa.pl/jpg/new_icon_in_explorer.jpg[^]

Eddy Vluggen9-Sep-12 5:35

9-Sep-12 5:35

Ah, those are called "Shell namespace extensions". There's an example here[^], along with this warning:

Editor's Update - 6/23/2006: Because shell extensions are loaded into arbitrary processes and because managed code built against one version of the runtime may not run in a process running an earlier version of the runtime, Microsoft recommends against writing managed shell extensions and does not consider them a supported scenario.

A commercial alternative would be EzNamespaceExtensions[^], but the recommended way is still to use a non-managed language.

Bastard Programmer from Hell Suspicious | :suss:

if you can't read my code, try converting it here[^]

Is it OK to implement Repository Pattern with Singleton in C# and EntityFramework ?

fakir4459-Sep-12 9:24

fakir445

9-Sep-12 9:24

Thanks You for Your help. Smile | :)

Mohammad Dayyan8-Sep-12 21:52

Mohammad Dayyan

8-Sep-12 21:52

As you know, in Entity Framework Repository Pattern we have new DbContext(or object context) in each entity's instance.
Is it OK to implement Repository Pattern with Singleton to have the same DbContext in each entity's instance? If so, could you please post some references ?
Thanks

Read more about Repository Pattern :
http://www.remondo.net/repository-pattern-example-csharp/[^]

Re: Is it OK to implement Repository Pattern with Singleton in C# and EntityFramework ?

Eddy Vluggen9-Sep-12 0:26