Asp net database connectivity pdf

Write "Student registeration Successfully!!! Now, we can insert the data into your database. Step 10 Now, we can added the GridView. Drag and drop method needs to be used.

Now, you can choose the data source, it is sqlDataSource. Here, the database data is added to GridView. Step 11 Here, you need to run any Browser and after a few minutes, you will get an output. Now, we can view the data. View All. Muthuramalingam Duraipandi Updated date Dec 14, Step 1. Step 5. Now, open the project. Step 6. Now, we can go to the Server Explorer and add your database. Step 7. Here, click Configure Data Source. Now, we can choose Specify columns from a table or view and afterwards, click Next button.

Step 8. This article makes use of a table named tblFiles whose schema is defined as follows. HTML Markup. You will need to import the following namespaces. Imports System. GetFileName FileUpload1.

FileName ;. ReadBytes Int32 fs. Length ;. ConnectionStrings[ "constr" ]. AddWithValue " Name" , filename ;. AddWithValue " Data" , bytes ;. Open ;. ExecuteNonQuery ;. Close ;. Redirect Request. AbsoluteUri ;. Using br As New BinaryReader fs. ReadBytes DirectCast fs. Length, Long. Viewed 4k times. Improve this question. The path to your files isn't correct. You'll need to use something like described in this question to convert it to a path usable by the client. Add a comment. Active Oldest Votes.

AddHeader "Content-Length", fileData. ToString ; context. Write fileData ; context. Improve this answer. Win Win I gave the possibility to user to upload file, then i want to give him the possibility to view this uploded file inside another page before downloading it. Sorry about that. An empty database is created with the same name as your site. In the left pane, expand the SmallBakery. Set the Is Primary Key?

As the name suggests, Is Primary Key tells the database that this will be the table's primary key. Is Identity tells the database to automatically create an ID number for every new record and to assign it the next sequential number starting at 1. For Data Type , choose "nvarchar" and set the length to The var part of nvarchar tells the database that the data for this column will be a string whose size might vary from record to record.

The n prefix represents national , indicating that the field can hold character data that represents any alphabet or writing system — that is, that the field holds Unicode data. Set the Allow Nulls option to No. This will enforce that the Name column is not left blank. Using this same process, create a column named Description. Set Data Type to "nvarchar" and 50 for the length, and set Allow Nulls to false. Create a column named Price. Set Data Type to "money" and set Allow Nulls to false.

Remember that you don't have to enter anything for the Id column. When you created the Id column, you set its Is Identity property to true, which causes it to automatically be filled in.

Once you've got a database with data in it, you can display the data in an ASP. NET web page. To select the table rows to display, you use a SQL statement, which is a command that you pass to the database. In the first code block, you open the SmallBakery. The Database. Open method assumes that the. Notice that you don't need to specify the. NET that's used to store data files. For more information, see Connecting to a Database later in this article.

You then make a request to query the database using the following SQL Select statement:. In the statement, Product identifies the table to query. You could also list columns individually, separated by commas, if you wanted to see only some of the columns. The Order By clause indicates how the data should be sorted — in this case, by the Name column. This means that the data is sorted alphabetically based on the value of the Name column for each row. In the body of the page, the markup creates an HTML table that will be used to display the data.

Each time you go through the loop, the next available row from the database is in the row variable you set this up in the foreach statement. To get an individual column from the row, you can use row. Name or row. Description or whatever the name is of the column you want.

Run the page in a browser. Make sure the page is selected in the Files workspace before you run it.

The page displays a list like the following:. SQL is a language that's used in most relational databases for managing data in a database.

It includes commands that let you retrieve data and update it, and that let you create, modify, and manage database tables. SQL is different than a programming language like the one you're using in WebMatrix because with SQL, the idea is that you tell the database what you want, and it's the database's job to figure out how to get the data or perform the task.

Here are examples of some SQL commands and what they do:. This fetches the Id , Name , and Price columns from records in the Product table if the value of Price is more than 10, and returns the results in alphabetical order based on the values of the Name column. This command will return a result set that contains the records that meet the criteria, or an empty set if no records match. This inserts a new record into the Product table, setting the Name column to "Croissant", the Description column to "A flaky delight", and the price to 1.

This command deletes records in the Product table whose expiration date column is earlier than January 1, This assumes that the Product table has such a column, of course. The Insert Into and Delete commands don't return result sets. Instead, they return a number that tells you how many records were affected by the command. For some of these operations like inserting and deleting records , the process that's requesting the operation has to have appropriate permissions in the database.

This is why for production databases you often have to supply a username and password when you connect to the database.