connecting to a database in vb net
Tài liệu Connecting to a Password-Protected Access Database ppt
Ngày tải lên :
24/12/2013, 05:15
...
attributes in addition to those defined by ADO .NET. To open a database secured by a
Microsoft Access database password, use the Jet OLEDB :Database Password attribute in
the connection string to specify ... ex.Message);
}
resultTextBox.Text = result.ToString( );
}
Discussion
A Microsoft Access database password requires that users enter a password to obtain
access to the database and database ... is also known as share-level security. A
password does not allow groups or users to have distinct levels of access or permissions.
Anyone with the password has unrestricted access to the database. ...
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Tài liệu Connecting to a Secured Access Database pptx
Ngày tải lên :
24/12/2013, 05:15
... Team LiB ]
[ Team LiB ]
Recipe 1.4 Connecting to a Secured Access Database
Problem
You want to connect to a Microsoft Access database that has been secured with user-level
security and ... defined by ADO .NET. To open a database secured by
Microsoft Access user-level security, use the Jet OLEDB:System Database attribute in
the connection string to specify the path and filename ...
The sample code contains a single event handler:
Connect Button.Click
Creates and opens a connection to a Microsoft Access database secured with user-
level security and a workgroup file using...
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Displaying an Image from a Database in a Web Forms Control
Ngày tải lên :
28/10/2013, 18:15
... need to display an image from a database column in an ASP .NET control.
Solution
Fill an ASP .NET Image control from a database field by pointing the ImageUrl property
of an Image control to a ... the database and
retrieve the image using a DataReader. A DataTable or DataSet filled using a
DataAdapter can also be used.
3. Set the ContentType property of the HttpResponse object to the ...
Rendering an image from a database in a Web Forms Image control is easy to do, but not
straightforward. Fortunately, it is much simpler with ASP .NET than it was in ASP.
Two web pages are required:...
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Displaying an Image from a Database in a Windows Forms Control
Ngày tải lên :
28/10/2013, 18:15
... within the data source, such as a row
in a DataTable.
The BindingContext class is used to instantiate a BindingManagerBase object
and either a CurrencyManager or PropertyManager object is ... Database in a Windows Forms Control
Problem
You need to display an image from a database in a Windows Forms control.
Solution
Read the image into a byte array and load it directly into a PictureBox ... returned
depending on the type of data source:
ã
The CurrencyManager class inherits from the BindingManagerBase
class and maintains a pointer for the current item in a data source that
implements...
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Connecting to an Access Databasefrom ASP.NET
Ngày tải lên :
07/11/2013, 13:15
... requires permissions to access the share that contains the
database file and folders.
The user account must be recognized by the Access computer. For a domain user
account, add it to the permissions ... computers. For a user account local to the
IIS computer, create a duplicate account on the Access computer with the same name and
password.
Grant the user account Log on Locally and Access this ... Execute, and Change permissions on the database file. The user identity
needs Read, Write, Execute, Delete, and Change permissions on the folder containing the
database files. The user account...
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Tài liệu Connecting to a Microsoft Excel Workbook ppt
Ngày tải lên :
14/12/2013, 18:16
...
Create a SQL SELECT statement referencing a worksheet or a range in an Excel
workbook and execute the statement to fill a DataSet using a DataAdapter or to create a
DataReader. For example: ...
INSERT INTO [MySheet$] (Field1, Field2, Field3)
VALUES ('testdata', 1.234, '09/28/1979');
Retrieve data
Use either a DataAdapter or a DataReader to retrieve data from an ... 1-2
.
Example 1-2. File: ExcelForm.cs
// Namespaces, Variables, and Constants
using System;
using System.Configuration;
using System.Data;
private OleDbDataAdapter da;
private DataTable...
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Tài liệu Connecting to a Named Instance of SQL Server or Microsoft Data Engine (MSDE) docx
Ngày tải lên :
14/12/2013, 18:16
... ConfigurationSettings.AppSettings["Sql_Msde_ConnectString"]);
Manager and Query Analyzer are also shared.
The System.Data.SqlClient class cannot automatically discover the port number of a
named instance of SQL Server listening on a port ... Team LiB ]
Recipe 1.7 Connecting to a Named Instance of SQL Server or Microsoft Data
Engine (MSDE)
Problem
You want to connect to a named instance of a SQL Server or Microsoft Data Engine ... need to understand what a SQL Server or MSDE named instance is and how to
connect to one. The sample code contains a single event handler:
Connect Button.Click
Creates and opens a connection to...
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Tài liệu Connecting to a Text File pptx
Ngày tải lên :
24/12/2013, 05:15
... provider can read records from and insert records into a text file data
source. The Jet database engine can access other database file formats through Indexed
Sequential Access Method (ISAM) drivers ... schema.ini file provides the following schema information about the data in the text
file:
[ Team LiB ]
Recipe 1.19 Connecting to a Text File
Problem
You want to use ADO .NET to access ... access data stored in a text file.
Solution
Use the OLE DB Jet provider to access data in a text file.
The sample code creates an OleDbDataAdapter that uses the Jet OLE DB provider to
load the...
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Tài liệu Storing XML to a Database Field doc
Ngày tải lên :
24/12/2013, 05:15
... demonstrates how to store XML data in a text field of a database table and
subsequently read it into an XmlDocument using the LoadXml( ) method. Standard
database access techniques using a DataAdapter ... System.Configuration;
using System.Windows.Forms;
using System.IO;
using System.Xml;
using System.Data;
using System.Data.SqlClient;
private DataTable dt;
private SqlDataAdapter da;
private ... // Create the data adapter.
da = new SqlDataAdapter(selectText,
ConfigurationSettings.AppSettings["Sql_ConnectString"]);
da.UpdateCommand = new SqlCommand(updateText,
da.SelectCommand.Connection);...
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Tài liệu Adding Tables to a Database pdf
Ngày tải lên :
21/01/2014, 11:20
... Team LiB ]
Recipe 10.8 Adding Tables to a Database
Problem
You need to add a table to an existing database.
Solution
Use the CREATE TABLE statement.
The sample code executes the DDL statement—using ... statement—using the ExecuteNonQuery( ) method o
f
the Command object to add a table to an existing SQL Server database.
The C# code is shown in Example 10-8
.
Example 10-8. File: AddTableToDatabaseForm.cs ... File: AddTableToDatabaseForm.cs
// Namespaces, variables, and constants
using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
// . . .
SqlConnection...
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Tài liệu VB .NET Language in a Nutshell pdf
Ngày tải lên :
09/12/2013, 17:15
... that has the following six properties:
Name
A variable's name is used to identify the variable in code. In VB .NET, a variable name can
start with a Unicode alphabetic character or an ... all kinds. Very much like Visual Basic 1.0
offered a graphical interface that was suitable for Windows applications, VB .NET and Visual
Studio .NET aim at providing a graphical interface that ... point to Visual Basic's support for interface-based
programming and the use of virtual base classes. Yet relatively few VB programmers take advantage
of interface-based programming. And...
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Tài liệu Beginning ASP.NET 2.0 in VB 2005 From Novice to Professional ppt
Ngày tải lên :
24/01/2014, 08:20
... relational databases. Chapters 14 and 15 explain how
to use data binding and the advanced ASP .NET data controls to create web pages that
integrate attractive, customizable data displays with automatic ... objects that automate
common tasks. If you want, you can even get ASP .NET to create and manage a database
with user information automatically. Finally, Chapter 20 deals with another add-on—the
profiles ... languages such as C# and VB 2005,
an engine for hosting programmable web pages and web services (ASP .NET) , a model for
interacting with databases (ADO .NET) , and a class library stocked with tools...
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