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hi
i am having two forms
form1 is having two functions and a bool variable
code is ::::
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public bool s = true;
Form2 f2 = new Form2();
private void Form1_Load(object sender, EventArgs e)
{
f2.MdiParent = this;
f2.Show();
}
public void a()
{
MessageBox.Show("u r in a ");
}
public void b()
{
MessageBox.Show("u r in b ");
}
}
the code for form 2 is
:::::::
public partial class Form2 : Form
{
Form1 ff;
public Form2()
{
InitializeComponent();
ff = (Form1)this.MdiParent;
}
private void button1_Click(object sender, EventArgs e)
{
ff.a();
ff.b();
if (ff.s == true)
{
MessageBox.Show("yes");
}
}
}
error is coming at ff.a().. ff.b()...ff.s as object reference not set to an instance of the object ....
plz tell me the problem
n..solution too
regards
sindhu tiwari
its me sid
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sindhutiwari wrote: error is coming at ff.a().. ff.b()...ff.s as object reference not set to an instance of the object ....
plz tell me the problem
The problem is as the exception said. In other words, ff is null .
sindhutiwari wrote: n..solution too
Think about the sequence that your statements are actually called in. You assign ff to be the MdiParent BEFORE you tell the form what its MdiParent is. Therefore ff is null because MdiParent is null at the time that ff is assigned.
The solution is to assign ff AFTER MdiParent is assigned. OR Don't use ff at all but to reference the MdiParent directly when it is needed.
You might also want to give things a sensible name. Form1, Form2, ff, a(), b() and so on are very poor names. They mean nothing to anybody.
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Hi,
I'm newly using FileIOPermission class, Can any one explain me how to use this class in .Net 1.0 using C#, to set or get permissions for the file?
Thanks in Advance,
SMARTech
************************************************
If you think you can, You Can...
************************************************
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shah_tech wrote: Can any one explain me how to use this class in .Net 1.0 using C#, to set or get permissions for the file?
Have you read the documentation[^]? It seems to have a fairly comprehensive example.
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I have built a windows service with c#.net.And to start that service i built a icon to start and stop that service with windows application.Now,I want to build a setup for that project and both the project needs to be installed with that setup file.How should I do this?please suggest me.
Thank u.
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You add the project output of both the service and windows application to the installer. All three projects will, naturally, sit in one solution.
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I'm trying to develop an application for a player's statistics per game. Here's the XML:
<GameStat>
<PlayerID>21</PlayerID>
<TeamID>8</TeamID>
<GameID>
<int>1</int>
<int>2</int>
<int>3</int>
<int>4</int>
</GameID>
<Score>
<int>18</int>
<int>25</int>
<int>15</int>
<int>31</int>
</Score>
</GameStat>
These data will be stored in an SQL Server Database. I have two tables, namely tblGame & tblGameInfo. When inserted in the database, the data will look like this: (pls don't mind the --)
tblGame
------------------------------------------
GameStatID----------PlayerID----------TeamID
1------------------------21----------------8
------------------------------------------
tblGameInfo
------------------------------------------
GameID----------Score
1--------------------18
2--------------------25
3--------------------15
4--------------------31
------------------------------------------
Can anybody please help me with this? Thanks
Just a C# newbie
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I think googling for SqlDataAdaptor, DataSet and DataTable will get you on your merry way
DataSet is basicly an in-memory kind-of database and DataTable are your tables. You can load your xml file in those.
If that's done, you can do whatever you want with it.
You can use it as a datasource, port it (trough the SqlDataAdaptor) to your database etc...
Hope that helps
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hi,
Assume that they are three forms form1 . form2 . form3
now
1. form1 is a mdi form
2. i am making a object of form2 in form1 then made form1 as . mdiparent of form2 then showing it.. till now its fine
3. i have made object of form3 in form2.which i am showing from form2
here i want to make form3 as a mdi child of form 1 how to do this
please do reply
regards
sindhu tiwari
its me sid
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I assume your are creating form3 in form2 as follow
<br />
<br />
form3 frm = new form3();<br />
<br />
then add
<br />
<br />
frm.mdiparent = this.mdiparent;<br />
<br />
Simple isn't it ?
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Does any1 know if its possible to disable gridview so no1 can click on it and copy the text, i.e. its totally disabled
cheers
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Hi,
Just set the gridview's Enabled property to "False", i.e.
<br />
GridView.Enabled=False<br />
Regards,
Ujjaval Modi
Manpower moves wrenches, horsepower moves cars, and the power of the mind moves the world.
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this doesnt stop someone right clicking on the text and copying it, this is what i need for them not to be able to right click and copy the text
any ideas?
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<asp:gridview visible="false">
Im afraid thats about your only choice. Im afraid that putting something on the internet makes it highlightable, right-click-able, view-sourceable or printable. There is no sure fire way of stopping any of these methods of copying the page short of making it invisible or not putting it on the internet to start with.
modified on Friday, December 21, 2007 5:53:36 AM
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ah i thought i had seen it somewhere before where you couldn't copy text
never mind
thanks anyway
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You can do it with some javascript, BUT that will work only against totally non-tech users. Anyone who know how to disable javascript or view page source in browser will be able to steal whatever you send to client.
[ My Blog] "Visual studio desperately needs some performance improvements. It is sometimes almost as slow as eclipse." - Rüdiger Klaehn "Real men use mspaint for writing code and notepad for designing graphics." - Anna-Jayne Metcalfe
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ive actually find some javascript now
is there an equilivant of onkeydown for asp.net gridview?
cheers
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ive managed to find some javascript which stops then right clicking on it but I need something that also stops them from ctrl c as well
any1 know?
thanks
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Can you please tell how to stop the users to copy the text using right click on it?
Thanks in Advance
SMARTech
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there you go:
document.oncontextmenu = function()
{
return false;
}
if ( document.layers )
{
window.captureEvents(Event.MOUSEDOWN);
window.onmousedown = function(e)
{
if ( e.target == document )
return false;
}
}
else
{
document.onmousedown = function()
{
return false;
}
}
// -->
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there you go:
document.oncontextmenu = function()
{
return false;
}
if ( document.layers )
{
window.captureEvents(Event.MOUSEDOWN);
window.onmousedown = function(e)
{
if ( e.target == document )
return false;
}
}
else
{
document.onmousedown = function()
{
return false;
}
}
// -->
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how about ctrl+a to select all then ctrl+c to copy
or, view source and copy it all from there.
You will never ever stop someone dedicated to copying the text froma web browser, the best you will achieve is hindering the non-techy.
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there must be a way of stopping some using ctrl c and a
how bout the below code i jus need to integrate it into asp.net
do you know how i could put on key down for asp.net?
function noCopyKey(e) {
var forbiddenKeys = new Array('c','x','v');
var keyCode = (e.keyCode) ? e.keyCode : e.which;
var isCtrl;
if(window.event)
isCtrl = e.ctrlKey
else
isCtrl = (window.Event) ? ((e.modifiers & Event.CTRL_MASK) == Event.CTRL_MASK) : false;
if(isCtrl) {
for(i = 0; i < forbiddenKeys.length; i++) {
if(forbiddenKeys[i] == String.fromCharCode(keyCode).toLowerCase()) {
alert('You are prompted to type this twice for a reason!');
return false;
}
}
}
return true;
}
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Hello everybody,
I am developing an C#.NET application and i want to change the background color of message box that shown on button click....
Is there any way to change background color of MessageBox.....
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No - you will have to create your own dialog (a window-form shown with .ShowDialog )
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