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by: authorking |
last post by:
I use the following code to insert a data record in to a datatable of an
access database.But every time I execute the command, there will rise an
exception and the insert operation can't be completed.
here's the code:
System.Data.OleDb.OleDbConnection hist_cnn = new
System.Data.OleDb.OleDbConnection();
System.Data.OleDb.OleDbCommand hist_command = new
System.Data.OleDb.OleDbCommand();
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by: authorking |
last post by:
I create the databse with the follwing code. I really don't know why the
insert operation can't be completed.
databse creation code:
ADOX.CatalogClass cat = new ADOX.CatalogClass();//define a Jet database
class
cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;" + "Data
Source=history_data.mdb;" + "Jet OLEDB:Engine Type=5");//create a Jet
database
System.Data.OleDb.OleDbConnection hist_cnn = new
System.Data.OleDb.OleDbConnection();
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by: Dave |
last post by:
I have a table with 3 fields of which the primary key is a autonumber. I have
created my dataadapter, dataset and datagridview using a wizard. However, in
the datagrid, the update and delete operation work but the Insert will not
work. I know I to make changes to code but it does not seem to work. portion
of the error reads:
The following exception occurred in the DataGridView:
System.Data.NoNullAllowedException: Column 'ID' does not...
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by: Dave |
last post by:
I have a table with 3 fields of which the primary key is a autonumber. I have
created my dataadapter, dataset and datagridview using a wizard. However, in
the datagrid, the update and delete operation work but the Insert will not
work. I know I to make changes to code but it does not seem to work. portion
of the error reads:
The following exception occurred in the DataGridView:
System.Data.NoNullAllowedException: Column 'ID' does not...
|
by: =?Utf-8?B?Q2hyaXM=?= |
last post by:
how do you insert a new row to a databound datagridview? It won't allow this
action.
|
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by: =?Utf-8?B?UmljaA==?= |
last post by:
On a form - I have a datagridview which is docked to the entire form. The
datagridview allows users to Delete and/or Add Rows. On the Form_Load event
I Fill the datagridview source table with a sql DataAdapter (da)
da.SelectCommand.CommandText = "Select * from Servertbl1"
da.Fill(ds, "tbl1")
so far, so good. If I add a row to the datagridview I use the following
sqlDataAdapter code to update the server table - which works OK when...
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by: Terry Olsen |
last post by:
I'm using OleDb to connect with an Access Database. I have anywhere from
10 to over 100 records that I need to either INSERT if the PK doesn't
exist or UPDATE if the PK does exist, all in a single transaction. Does
anyone have an SQL statement I can throw at it that would accomplish
this?
If I can't figure out how to do it, I'm going to have to send two
discreet SQL commands for each record which will take infinitely longer
than a...
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by: Andrus |
last post by:
I tried to edit data in DataGridView.
Insert and delete operations in grid are not saved to database. Updating
works OK.
How to force grid to save Insert and Delete operations also ?
Andrus.
Northwind db = CreateDB();
var list = new BindingList<Customer>(db.GetTable<Customer>().ToList() );
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by: jchaturv |
last post by:
All,
I have a customized DataGridView where I have implemented extra functionality and bounded datasource in the same custom DataGridView (Using
C# and .NET). Now, I could able to use it properly by placing it on a panel control. I have added label as button on panel control to display
data from datasource on to datagrid and create a binding source. Another Label which act as a button is used to update data from grid to
databse.
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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