Update Access Database with DataSet
1
I am writing because I have a problem with updating my access database with the dataset. i am getting no errors but the database doesn't seem to update.
Here is my code:
public partial class Form1 : Form{
private DataSet ds = new DataSet();
string dbconnection = "Provider=Microsoft.JET.OLEDB.4.0;" + @"data source =../../database/Log1.mdb";
string dbcommand = "SELECT * FROM Log";
private void addRow(int action)
{
string actionCase = "Uknown action";
switch (action)
{
case 1:
actionCase = "Nothing";
break;
case 2:
actionCase = "Is";
break;
case 3:
actionCase = "Working";
break;
case 4:
actionCase = "what";
break;
}
DataRow row = ds.Tables["Log"].NewRow();
row["action"] = actionCase;
row["actionDateAndTime"] = DateTime.Now.ToString();
ds.Tables["Log"].Rows.Add(row);
ds.AcceptChanges();
}
private void button_Click(object sender, EventArgs e)
{
addRow(1);
OleDbConnection conn = new OleDbConnection(dbconnection);
OleDbCommand comm = new OleDbCommand(dbcommand, conn);
OleDbDataAdapter adapter = new OleDbDataAdapter(comm);
OleDbCommandBuilder builder = new OleDbCommandBuilder(adapter);
adapter.UpdateCommand = builder.GetUpdateCommand();
adapter.Update(ds, "Log");
}
The database has 3 columns, ID being a primary key, action and actionDateAndTime, both set to Short Text.
c#
asked Nov 14 '18 at 14:59
PpottoPpotto
184
|
show 3 more comments
1
I am writing because I have a problem with updating my access database with the dataset. i am getting no errors but the database doesn't seem to update.
Here is my code:
public partial class Form1 : Form{
private DataSet ds = new DataSet();
string dbconnection = "Provider=Microsoft.JET.OLEDB.4.0;" + @"data source =../../database/Log1.mdb";
string dbcommand = "SELECT * FROM Log";
private void addRow(int action)
{
string actionCase = "Uknown action";
switch (action)
{
case 1:
actionCase = "Nothing";
break;
case 2:
actionCase = "Is";
break;
case 3:
actionCase = "Working";
break;
case 4:
actionCase = "what";
break;
}
DataRow row = ds.Tables["Log"].NewRow();
row["action"] = actionCase;
row["actionDateAndTime"] = DateTime.Now.ToString();
ds.Tables["Log"].Rows.Add(row);
ds.AcceptChanges();
}
private void button_Click(object sender, EventArgs e)
{
addRow(1);
OleDbConnection conn = new OleDbConnection(dbconnection);
OleDbCommand comm = new OleDbCommand(dbcommand, conn);
OleDbDataAdapter adapter = new OleDbDataAdapter(comm);
OleDbCommandBuilder builder = new OleDbCommandBuilder(adapter);
adapter.UpdateCommand = builder.GetUpdateCommand();
adapter.Update(ds, "Log");
}
The database has 3 columns, ID being a primary key, action and actionDateAndTime, both set to Short Text.
c#
asked Nov 14 '18 at 14:59
PpottoPpotto
184
1
"the database doesn't seem to update" - doesn't seems to update or is not updated? Is database working elsewhere?
– Sinatr
Nov 14 '18 at 15:04
1
Maybe the output database is copied from project folder to bin every time solution is started. How you check that no rows are in db?
– Grzesiek Danowski
Nov 14 '18 at 15:05
1
.. and it still empty no matter what you add? How do you check? By restarting the software or by observing file with something else? Typical error is to set "copy to output folder" for mdb-file included into project.
– Sinatr
Nov 14 '18 at 15:09
1
Accodring to this answer you are missing at least insert command, because you are not updating existing field, but adding a new one.
– Sinatr
Nov 14 '18 at 15:25
1
AcceptChanges()doesnt do what you think it does. It clears all the change flags so that there is nothing to update. Also, if you just have one DataTable, a DataSet is overkill and if you hold one to the DataAdapter you dont have toGetUpDateCommandor create a connection every time - a DataAdapter can be very powerful
– None of the Above
Nov 14 '18 at 15:26
|
show 3 more comments
1
1
1
I am writing because I have a problem with updating my access database with the dataset. i am getting no errors but the database doesn't seem to update.
Here is my code:
public partial class Form1 : Form{
private DataSet ds = new DataSet();
string dbconnection = "Provider=Microsoft.JET.OLEDB.4.0;" + @"data source =../../database/Log1.mdb";
string dbcommand = "SELECT * FROM Log";
private void addRow(int action)
{
string actionCase = "Uknown action";
switch (action)
{
case 1:
actionCase = "Nothing";
break;
case 2:
actionCase = "Is";
break;
case 3:
actionCase = "Working";
break;
case 4:
actionCase = "what";
break;
}
DataRow row = ds.Tables["Log"].NewRow();
row["action"] = actionCase;
row["actionDateAndTime"] = DateTime.Now.ToString();
ds.Tables["Log"].Rows.Add(row);
ds.AcceptChanges();
}
private void button_Click(object sender, EventArgs e)
{
addRow(1);
OleDbConnection conn = new OleDbConnection(dbconnection);
OleDbCommand comm = new OleDbCommand(dbcommand, conn);
OleDbDataAdapter adapter = new OleDbDataAdapter(comm);
OleDbCommandBuilder builder = new OleDbCommandBuilder(adapter);
adapter.UpdateCommand = builder.GetUpdateCommand();
adapter.Update(ds, "Log");
}
The database has 3 columns, ID being a primary key, action and actionDateAndTime, both set to Short Text.
c#
asked Nov 14 '18 at 14:59
PpottoPpotto
184
I am writing because I have a problem with updating my access database with the dataset. i am getting no errors but the database doesn't seem to update.
Here is my code:
public partial class Form1 : Form{
private DataSet ds = new DataSet();
string dbconnection = "Provider=Microsoft.JET.OLEDB.4.0;" + @"data source =../../database/Log1.mdb";
string dbcommand = "SELECT * FROM Log";
private void addRow(int action)
{
string actionCase = "Uknown action";
switch (action)
{
case 1:
actionCase = "Nothing";
break;
case 2:
actionCase = "Is";
break;
case 3:
actionCase = "Working";
break;
case 4:
actionCase = "what";
break;
}
DataRow row = ds.Tables["Log"].NewRow();
row["action"] = actionCase;
row["actionDateAndTime"] = DateTime.Now.ToString();
ds.Tables["Log"].Rows.Add(row);
ds.AcceptChanges();
}
private void button_Click(object sender, EventArgs e)
{
addRow(1);
OleDbConnection conn = new OleDbConnection(dbconnection);
OleDbCommand comm = new OleDbCommand(dbcommand, conn);
OleDbDataAdapter adapter = new OleDbDataAdapter(comm);
OleDbCommandBuilder builder = new OleDbCommandBuilder(adapter);
adapter.UpdateCommand = builder.GetUpdateCommand();
adapter.Update(ds, "Log");
}
The database has 3 columns, ID being a primary key, action and actionDateAndTime, both set to Short Text.
c#
c#
asked Nov 14 '18 at 14:59
PpottoPpotto
184
asked Nov 14 '18 at 14:59
PpottoPpotto
184
asked Nov 14 '18 at 14:59
PpottoPpotto
184
asked Nov 14 '18 at 14:59
PpottoPpotto
184
asked Nov 14 '18 at 14:59
PpottoPpotto
184
184
1
"the database doesn't seem to update" - doesn't seems to update or is not updated? Is database working elsewhere?
– Sinatr
Nov 14 '18 at 15:04
1
Maybe the output database is copied from project folder to bin every time solution is started. How you check that no rows are in db?
– Grzesiek Danowski
Nov 14 '18 at 15:05
1
.. and it still empty no matter what you add? How do you check? By restarting the software or by observing file with something else? Typical error is to set "copy to output folder" for mdb-file included into project.
– Sinatr
Nov 14 '18 at 15:09
1
Accodring to this answer you are missing at least insert command, because you are not updating existing field, but adding a new one.
– Sinatr
Nov 14 '18 at 15:25
1
AcceptChanges()doesnt do what you think it does. It clears all the change flags so that there is nothing to update. Also, if you just have one DataTable, a DataSet is overkill and if you hold one to the DataAdapter you dont have toGetUpDateCommandor create a connection every time - a DataAdapter can be very powerful
– None of the Above
Nov 14 '18 at 15:26
|
show 3 more comments
1
"the database doesn't seem to update" - doesn't seems to update or is not updated? Is database working elsewhere?
– Sinatr
Nov 14 '18 at 15:04
1
Maybe the output database is copied from project folder to bin every time solution is started. How you check that no rows are in db?
– Grzesiek Danowski
Nov 14 '18 at 15:05
1
.. and it still empty no matter what you add? How do you check? By restarting the software or by observing file with something else? Typical error is to set "copy to output folder" for mdb-file included into project.
– Sinatr
Nov 14 '18 at 15:09
1
Accodring to this answer you are missing at least insert command, because you are not updating existing field, but adding a new one.
– Sinatr
Nov 14 '18 at 15:25
1
AcceptChanges()doesnt do what you think it does. It clears all the change flags so that there is nothing to update. Also, if you just have one DataTable, a DataSet is overkill and if you hold one to the DataAdapter you dont have toGetUpDateCommandor create a connection every time - a DataAdapter can be very powerful
– None of the Above
Nov 14 '18 at 15:26
1
1
"the database doesn't seem to update" - doesn't seems to update or is not updated? Is database working elsewhere?
– Sinatr
Nov 14 '18 at 15:04
"the database doesn't seem to update" - doesn't seems to update or is not updated? Is database working elsewhere?
– Sinatr
Nov 14 '18 at 15:04
1
1
Maybe the output database is copied from project folder to bin every time solution is started. How you check that no rows are in db?
– Grzesiek Danowski
Nov 14 '18 at 15:05
Maybe the output database is copied from project folder to bin every time solution is started. How you check that no rows are in db?
– Grzesiek Danowski
Nov 14 '18 at 15:05
1
1
.. and it still empty no matter what you add? How do you check? By restarting the software or by observing file with something else? Typical error is to set "copy to output folder" for mdb-file included into project.
– Sinatr
Nov 14 '18 at 15:09
.. and it still empty no matter what you add? How do you check? By restarting the software or by observing file with something else? Typical error is to set "copy to output folder" for mdb-file included into project.
– Sinatr
Nov 14 '18 at 15:09
1
1
Accodring to this answer you are missing at least insert command, because you are not updating existing field, but adding a new one.
– Sinatr
Nov 14 '18 at 15:25
Accodring to this answer you are missing at least insert command, because you are not updating existing field, but adding a new one.
– Sinatr
Nov 14 '18 at 15:25
1
1
AcceptChanges() doesnt do what you think it does. It clears all the change flags so that there is nothing to update. Also, if you just have one DataTable, a DataSet is overkill and if you hold one to the DataAdapter you dont have to GetUpDateCommand or create a connection every time - a DataAdapter can be very powerful– None of the Above
Nov 14 '18 at 15:26
AcceptChanges() doesnt do what you think it does. It clears all the change flags so that there is nothing to update. Also, if you just have one DataTable, a DataSet is overkill and if you hold one to the DataAdapter you dont have to GetUpDateCommand or create a connection every time - a DataAdapter can be very powerful– None of the Above
Nov 14 '18 at 15:26
|
show 3 more comments
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1
"the database doesn't seem to update" - doesn't seems to update or is not updated? Is database working elsewhere?
– Sinatr
Nov 14 '18 at 15:04
1
Maybe the output database is copied from project folder to bin every time solution is started. How you check that no rows are in db?
– Grzesiek Danowski
Nov 14 '18 at 15:05
1
.. and it still empty no matter what you add? How do you check? By restarting the software or by observing file with something else? Typical error is to set "copy to output folder" for mdb-file included into project.
– Sinatr
Nov 14 '18 at 15:09
1
Accodring to this answer you are missing at least insert command, because you are not updating existing field, but adding a new one.
– Sinatr
Nov 14 '18 at 15:25
1
AcceptChanges()doesnt do what you think it does. It clears all the change flags so that there is nothing to update. Also, if you just have one DataTable, a DataSet is overkill and if you hold one to the DataAdapter you dont have toGetUpDateCommandor create a connection every time - a DataAdapter can be very powerful– None of the Above
Nov 14 '18 at 15:26