ListView checkboxes... [modified] - C# Discussion Boards

Re: changing a column type of datagridview ?

MCSD-Gandalf12-Jun-06 7:14

12-Jun-06 7:14

Seems to me the easiest solution is to make the first column a STRING. All you are doing is using it for displaying data anyway. Verify that it is a valid value, convert it to a string for display in the datagrid. If you need to pull it out, all you have to do is cast it back to whatever numeric datatype you are using.

HTH

Gandalf

datagridview delete last row when sort order changes ?

cmpeng3412-Jun-06 2:48

cmpeng34

12-Jun-06 2:48

hi all,
i have a datagrid view with a few columns (data in datagrid read from access).
and i added a new row at the bottom to store some result operations like sum of some columns.
if one clicks on a column header to change sort order i want to remove the last row (which i added manually) and do sorting. when sorting completed then i want to add the same column again.
i mean i dont want that lastly added row to be sorted with other rows.
in which event i should write such kind of codes ?
help please,
thanks in advance.
bye.

Re: datagridview delete last row when sort order changes ?

Elina Blank12-Jun-06 8:10

Elina Blank

12-Jun-06 8:10

If I understood it correctly, you need the last row only for display purposes.
If this is the case, then why to add it to the datagrid at all?
Store it separetely, and add manually when you need.
This way you can use standard sort event.

Sincerely,
Elina

Life is great!!!
Enjoy every moment of it! Blush | :O

How to Run exe from memory or stream ?

hdv21212-Jun-06 1:58

hdv212

12-Jun-06 1:58

hi i embedd my exe in vs.net project as resource . now in run time i want to run my exe and don't save it in hard . how to do ?
my idea is load exe (in resource) to stream and run it . byt how to run it ?
my exe is win32 application ..
thanks..

Re: How to Run exe from memory or stream ?

Super Lloyd12-Jun-06 2:10

Super Lloyd

12-Jun-06 2:10

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/createprocess.asp[^]

But the easiest way, by far, is to save your exe in some temp file and simply
Process.Start(tempFileName)

SNMP TRAP Programming in C#[modified]

bannapradeep12-Jun-06 1:53

bannapradeep

12-Jun-06 1:53

How to generate trape code with use of SNMP in C# if u know it plz give the code URGENT

Pradeep

-- modified at 12:41 Monday 12th June, 2006

minimixing the fullscreen window in javascript

Vivek Pokale12-Jun-06 1:38

Vivek Pokale

12-Jun-06 1:38

Hello,

Can anybody tell me how to minimize the fullscreen window in javascript.

Regards,
Vivek Pokale

vivek

ListView checkboxes... [modified]

Kasic Slobodan12-Jun-06 1:20

Kasic Slobodan

12-Jun-06 1:20

First, Iam sorry for the subject. I can't get any appropriate subject for this thread.

Now, the problem.
I have listview with checkboxes. when I double click on listview item, checkbox gets checked.
I was wandering how can I prevent checkbox to get checked on double click and instead of checking checkboxes to run an method or anything else, but to still have checkboxes and to check them by clicking on each one?

I've tried with

ListViewItem item = (ListViewItem)sender;<br />
item.Checked = false;

plased on doubleclick event of listview, but raises an error?
Is there any other resolution?

Iam working on Framework 1.1 - for now Smile | :)

.

-- modified at 7:23 Monday 12th June, 2006

Re: ListView checkboxes...

Ed.Poore12-Jun-06 9:15

Ed.Poore

12-Jun-06 9:15

Kasic Slobodan wrote:
ListViewItem item = (ListViewItem)sender;
item.Checked = false;

If you'd read the error then it'd tell you that sender cannot be cast to ListViewItem because sender is in fact an instance of ListView D'Oh! | :doh:

. In fact if you're running it inside the debugger then it'd even break on that line for you.

It'd be best to handle the ItemChecked event, if the checkbox wasn't suppose to be checked then invert it, otherwise leave it alone.

You know you're a Land Rover owner when the best route from point A to point B is through the mud.

Ed

Re: ListView checkboxes... [modified]

Kasic Slobodan13-Jun-06 0:43

Kasic Slobodan

13-Jun-06 0:43

Yes, you'r right.
I get "Additional information: Specified cast is not valid." when casting ListViewItem to sender.

I will try something.
Thanks

DataGrid..Assign Runtime Values?

innocent7312-Jun-06 1:20

innocent73

12-Jun-06 1:20

Hi Folks,
I have 3 datagrids on a same webform. I want to assign a value to 3rd datagrid's specific cell on DataGrid2's SelectedIndexChanged event.
How can I do this?
Is it possible to do this on Runtime?

private void DataGrid2_SelectedIndxChanged(object sender, System.EventArgs e)
{
//Assign a specific value to DataGrid3
}

Thanks in advance and King Regards

Re: DataGrid..Assign Runtime Values?

Mairaaj Khan12-Jun-06 1:47

Mairaaj Khan

12-Jun-06 1:47

i'm not sure about it for datagrid because am using datagridview. but any way try this:

datagrid.Rows[2].Cell[1].Value= "any value";

Best of Luck.

_____________________________
Success is not something to wait for, its something to work for.

tabcontrol problem ? howto check if a different tab is clicked ?

cmpeng3412-Jun-06 1:01

cmpeng34

12-Jun-06 1:01

hi all,
on a tabcontrol, how do i know that if a different tab is clicked ?
am i able to check this ? how ¿
let's say i have 3 tabpages. how can i show a messagebox with tabpage's.text when clicked ?
thanks in advance,
bye.

Re: tabcontrol problem ? howto check if a different tab is clicked ?

Mairaaj Khan12-Jun-06 1:31

Mairaaj Khan

12-Jun-06 1:31

Mehmet Fatih Akbulut wrote:
on a tabcontrol, how do i know that if a different tab is clicked ?
am i able to check this ?

Yes. Write the following code in tabcontrol's Selected event.

if(e.TabPageIndex == 0)<br />
  MessageBox(e.TabPge.Name);<br />
else if(e.TabPageIndex == 1)<br />
  MessageBox(e.TabPge.Name);

Regards.

_____________________________
Success is not something to wait for, its something to work for.

Re: tabcontrol problem ? howto check if a different tab is clicked ?

MCSD-Gandalf12-Jun-06 2:13

MCSD-Gandalf

12-Jun-06 2:13

I use the tabcontrol quite a bit in my application, and although you CAN use the index of the tab pages, using the text property gives you a bit more flexibility IMHO. For instance, so far my users have added 3 different tab pages, and deleted 2 of them, and changed the order of them 3 more times. By using the tabControlName.SelectedTab.Text property instead of the index, I don't have to change NEARLY as much code when things change, and my maintenance programmers will have a much easier time too. Wink | ;)

HTH

Gandalf

Re: tabcontrol problem ? howto check if a different tab is clicked ?

Andrei Ungureanu12-Jun-06 4:18

Andrei Ungureanu

12-Jun-06 4:18

hy,

there is a very simple way to see which tab is selected. Use the SelectedIndex property.

for example:
if (tabControl1.SelectedIndex == 1)
{
MessageBox.Show("Tab1");
}

you can also use this property to select a tab page:
tabControl1.SelectedIndex = 2;

If I'm not mistaking the first tab has the index 1 (or 0). Try it.

Re: tabcontrol problem ? howto check if a different tab is clicked ?

Mairaaj Khan12-Jun-06 20:53

Mairaaj Khan

12-Jun-06 20:53

karkster wrote:
If I'm not mistaking the first tab has the index 1 (or 0).

index start from zero (0) for first item.

_____________________________
Success is not something to wait for, its something to work for.

How to Clear data from DataGridView?

Mairaaj Khan12-Jun-06 0:47

Mairaaj Khan

12-Jun-06 0:47

Hi,
How can we clear data from the datagridview, which is not bounded with any data source.
I am using this gridview on entry form, which get data from the user and send it to the database. After this it should be cleared along with other boxes, but how! Cry | :((

If any body have any idea, please let me to know!

Thanks.

_____________________________
Success is not something to wait for, its something to work for.

Writting listview items to xml file

chandler8312-Jun-06 0:47

chandler83

12-Jun-06 0:47

hai.. i am in a need to write the listview items in to a xml file.. my list view collection has 2 columns(attribute name and attribute value) and the no. of items is not constant. later i have to write the xml contents in to the listview.

plz give me some ideas.... i am using c# and windows application it is....

Thanks in advance...Urgent help plz...

Re: Writting listview items to xml file

rah_sin12-Jun-06 0:50

rah_sin

12-Jun-06 0:50

u can store the data of list view into dataset
and then write it into xml file by using
dataset's WriteXml method.

rahul

Re: Writting listview items to xml file

chandler8312-Jun-06 1:11

chandler83

12-Jun-06 1:11

hi rahul thanks a million for ur immediate reply....
my prob is... i will capture all the input values from the user... controls in the form 3 textboxes and a list view item... user can enter as many items as he needs in tht listbox control....

i have to save these values in the xml file and then i will use the same file to repopulate the form...

guide me plz.......

sample code will be much useful for me....

Re: Writting listview items to xml file

rah_sin12-Jun-06 1:35

rah_sin

12-Jun-06 1:35

According to ur reqirement i think u have to use two dataset's
one for storing 3 textbox values and another for populating listbox
becouse daset's writexml method writes data in xml file using table name tag,
column name and value tag,so for single entry u can not store multiple
values of listbox.

so u cn try
Dataset ds = new Dataset();
DataTable tbl1 = new DataTable();
tbl1.Columns.Add(new DataColumn("column name",typeof(String)));
tbl1.Columns.Add(new DataColumn("column name",typeof(String)));
tbl1.Columns.Add(new DataColumn("column name",typeof(String)));

DataRow dr = tbl1.NewRow();
dr["column name"] = textbox1.text;
dr["column name"] = textbox2.text;
dr["column name"] = textbox3.text;
tbl1.Rows.Add(dr);

Ds.Tables.Add(tbl1);

Ds.WriteXml("coplete path and name of xml file");

same way u can try to add data to second datasset which will store values
of listbox items.
and after that for reading u can use dataset's ReadXml method and populate
data into textbox and listbox from these datasets.

rahul

Problem with TVM_GETITEM

suguimoto12-Jun-06 0:44

suguimoto

12-Jun-06 0:44

Hello!

I can´t make SendMessage work with TVM_GETITEM!
I returns garbage always =/
This program is supposed to read a item´s name from a TreeView!

Here is the code:

public const int TV_FIRST = 0x1100;

public enum TV_Messages
{
TVM_GETNEXTITEM = (TV_FIRST + 10),
TVM_GETITEM = (TV_FIRST + 12), //62
TVM_GETCOUNT = (TV_FIRST + 5),
TVM_SELECTITEM = (TV_FIRST + 11),
TVM_DELETEITEM = (TV_FIRST + 1),
TVM_EXPAND = (TV_FIRST + 2),
TVM_GETITEMRECT = (TV_FIRST + 4),
TVM_GETINDENT = (TV_FIRST + 6),
TVM_SETINDENT = (TV_FIRST + 7),
TVM_GETIMAGELIST = (TV_FIRST + 8),
TVM_SETIMAGELIST = (TV_FIRST + 9),
TVM_GETISEARCHSTRING = (TV_FIRST + 64),
TVM_HITTEST = (TV_FIRST + 17),
}
public const int TVIF_TEXT = 0x0001;
public const int TVIF_PARAM = 0x4;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct TVITEM
{
public int mask;
public IntPtr hItem;
public int state;
public int stateMask;
public IntPtr pszText;
public int cchTextMax;
public int iImage;
public int iSelectedImage;
public int cChildren;
public IntPtr lParam;
}

private void button1_Click(object sender, EventArgs e)
{
TVITEM tvItem = new TVITEM();
tvItem.hItem = (IntPtr)Int32.Parse(textBox1.Text);
tvItem.cchTextMax = 512;
tvItem.mask = TVIF_TEXT;
tvItem.pszText = Marshal.AllocHGlobal(512);

IntPtr ptrTvi = Marshal.AllocHGlobal(Marshal.SizeOf(tvItem));
Marshal.StructureToPtr(tvItem, ptrTvi, false);

SendMessage(TreeHandle, (int)TV_Messages.TVM_GETITEM, IntPtr.Zero, ptrTvi); // TreeHandle got from FindWindow and FindWindowEx

string text = Marshal.PtrToStringAuto(tvItem.pszText);

MessageBox.Show(text);
Marshal.FreeHGlobal(tvItem.pszText);
Marshal.FreeHGlobal(ptrTvi);
}
}
If anyone got any idea, please help me!

Thanks!

File Downloading - Help Please

Andrew Mercer12-Jun-06 0:17

Andrew Mercer

12-Jun-06 0:17

Hi,

I have recetly moved from Java to .NET/C#.

I am trying to download a file from my test website and save it to disk on any client machine (this means getting access to each clients hard disk etc).

In java this required the use of applets etc...

I have so far not found the corresponding code in C#/.NET.

I am wanting to

(i) click a button in a web page on my website.
(ii) do some security checks before proceeding
(iii) stream the file(s) from the source directory on the website host machine
(iv) stream the file(s) to the client
(v) save the file(s) to the clients hard disk.
(vi) the original file may need to be zipped so the client side operation may require an automatic unzipping process

I know I could zip all the files and then add a link to my webpage that the user selects to download the file and then they manually unzip the relevant files but in some instances an automatic approach would be better.

Any help greatly appreciated.

I have also posted this to the .NET board if this is the wrong discussion board.

I will keep searching.

Regards Andrew Mercer

DataGridView.SelectedRows to DataTable in C#

peshawarcoder11-Jun-06 23:03

peshawarcoder

11-Jun-06 23:03

How can i convert the DataGridView.SelectedRows to DataTable in C#.

Thanks

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