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Here is what I do:
I open a new project,
I create a database,
I enter one table into the database,
I add three or four records to the table,
I add the database as a data source,
I drag the table from the data source to the form to create a datagridview,
I run the program,
I edit/add records on the form and click the Save button from the binding navigator,
I close the program,
I re-open the program,
and the changes are not there.
What am I missing?
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I found the answer:
SOLUTION:
1. Right Click Properties on tablename.mdf in Solution Explorer
2. Set the "Copy to Output Directory" property to "Copy if newer"
3. Run the program, and it should work in the IDE.
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Hi Daniel,
In C# i add/edit/delete database data by triggering store_procedures with help of a partcular event(most times a buttom_click).
I really don´t edit the way you said because it accepts everthing, so i don´t do that stuff. I always create conditions!!! so that method doesn´t apply to me.
So, i dont know if you have already your anwser, but remember that you are editing a database not the datagrdview!!! 
nelsonpaixao@yahoo.com.br
trying to help & get help
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In my c# 2005 windows form application I have a timer that pulls data from a mssql 2005 database. The query and code works fine most of the time. Occationally the sql connection will time out when connecting to the database or I'll get deadlocked by someone elses program.
What I need to change in my code so if the SQL connections has a exception it will continue to run as if nothing happened or change a label to say timeout. Since the SQL commands run on a timmer it will run again to update it shortly.
private void SQL_Timer_Tick(object sender, EventArgs e)
{
SqlConnection connection = new SqlConnection(connectionString);
connection.Open();
SqlCommand command = new SqlCommand("SELECT site from table);
SqlDataReader reader = command.ExecuteReader();
while (reader.Read())
{
presite.Add(reader.GetString(0));
point.Add(reader.GetString(1));
}
connection.Close();
}
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Catch the Exception.
Oh, I forgot, you'll want to know what the problem was; deep inside the System.Data.SqlClient.SqlException is an error code you can translate.
Among the code included with my database accessor article[^] is the file SqlServerErrorInfo.cs which should be of help.
modified on Tuesday, October 28, 2008 2:19 PM
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I have this activex control in my C# application. It has a method that will allocate a block of memory and return a variant. The variant contains HGLOBAL to the memory. In C++ it is simple to GlobalLock the memory pointer and access the data. How does one do this in C#?
system.object va;
va = object.GetMethod();
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Here is c++ code, want to do same in c#:
COleVariant va;
BYTE *pSrc;
va = m_object.GetMethod();
HGLOBAL h = (HGLOBAL)va.lVal;
pSrc = (BYTE*)GlobalLock(h);
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Hello World !
I want to call(run) my default dial_up connection with C#...
how can this ...
TanX world ...
if(Human.live)
{
Human.peaceful = false;
while(true)
{
Human.love(Human girl, Human Boy);
}
}
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Hello everyone,
My application runs under low privilege account like NetWork Service, but in some specific method I need to have high privilege (e.g. to write to registry or access some local file).
So, I want to change the user privilege of some specific method of a class. Does anyone have any good ideas how to do this in .Net?
thanks in advance,
George
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George_George wrote: Does anyone have any good ideas how to do this in .Net?
Yes.
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.freetls.fastly.net/script/Forums/Images/coffee.gif)
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Hi Mark,
Do you mean impersonate?
I have investigated impersonate technologies and it looks good. But two more issues with
impersonate technogies.
http://www.codeproject.com/KB/cs/zetaimpersonator.aspx
- How to manage the password expire issue? (for example, in the current domain, the
policy is for every 6 months, password must be changed);
- Is it possible to impersonate from a high privilege to a low privilege user without
providing password? My concern is to hardcode password in source code.
regards,
George
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George_George wrote: How to manage the password expire issue?
How are you dealing with it on the account the process starts under?
Mark Salsbery
Microsoft MVP - Visual C++
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Sorry Mark!
I do not know what do you mean "dealing with it on the account the process starts under" -- could you say some other words please?
regards,
George
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I have investigated impersonate technologies and it looks good. But two more issues with
impersonate technogies.
http://www.codeproject.com/KB/cs/zetaimpersonator.aspx
- How to manage the password expire issue? (for example, in the current domain, the
policy is for every 6 months, password must be changed);
- Is it possible to impersonate from a high privilege to a low privilege user without
providing password? My concern is to hardcode password in source code.
regards,
George
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I may be wrong, but I don't think a running application can (nor should) elevate its privileges beyond that of the currently logged in user.
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
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I don't care if you *can* or not, I'm saying you shouldn't. User privileges are established for a reason.
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
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Thanks John,
Are there any technologies which I could use to impersonate? Thanks again! 
regards,
George
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Thanks Le Centriste,
I like this comprehensive document. But it does not answer my question. My question is about how to change user privilege in a special method, i.e. impersonate. Do you have any good ideas for solution?
This document you recommended does not answer my question.
regards,
George
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I know this may sound like a stupid question, but my head is completely empty today. 
I have three group boxes whose contents all differ greatly but only one of the three is displayed at any point in time. This leads to my question, does disabling and making not visible free up the memory from a group boxes contents or is there another method which should be used?
Cheers
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As long as the form is alive, and unless you specifically dispose/null the controls, they will always consume the memory they need.
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
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Thank you, I will have to think about this one for a little bit and assess the best way to structure the program so there is not things sat in memory unused for long periods of time.
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It's actually best to allocate them early and leave them in memory if possible, especially if they could potentially be used semi-frequently. Unless the group controls contain child controls that get data from a list or array, you should be okay. Concentrate on other parts of the program instead.
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
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I am using the following code to replace the word "hello" with "hi"
if (strData.ToLower().Trim().Contains("hello there"))
{
strData = "hi there"
}
Question:
How do i modify the above code so that it also consides upper as well as lower characters.
So in the above example, I might have "Hello There" and not "hello there"
Thanks
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