How to check DataReader rows count?
The SQLDataReader doesn’t have a row count property the easiest way to get the count would be to do this… lblMsg. Text = string. Format(“Number of rows: {0}”, count); // <—- and here.
What is ExecuteReader in C#?
The ExecuteReader() in C# SqlCommand Object sends the SQL statements to the Connection Object and populate a SqlDataReader Object based on the SQL statement. When the ExecuteReader method in SqlCommand Object execute , it will instantiate a SqlClient.
What is the use of HasRows in C#?
The HasRows property returns information about the current result set. If the DataTableReader contains multiple result sets, you can examine the value of the HasRows property immediately after you call the NextResult method in order to determine whether the new result set contains rows.
How do I count the number of rows in a table in SQL?
To counts all of the rows in a table, whether they contain NULL values or not, use COUNT(*). That form of the COUNT() function basically returns the number of rows in a result set returned by a SELECT statement.
What are the advantages of Ado net?
Interoperability. The ability to communicate across heterogeneous environments.
What is difference between ExecuteScalar and ExecuteNonQuery?
ExecuteScalar() only returns the value from the first column of the first row of your query. ExecuteReader() returns an object that can iterate over the entire result set. ExecuteNonQuery() does not return data at all: only the number of rows affected by an insert, update, or delete.
What is data reader in Ado net?
In ADO.NET, a DataReader is a broad category of objects used to sequentially read data from a data source. DataReaders provide a very efficient way to access data, and can be thought of as a Firehose cursor from ASP Classic, except that no server-side cursor is used.
Which property of SqlDataReader class is used to check if SqlDataReader has rows?
SqlDataReader Properties
| Property | Description |
|---|---|
| HasRows | It is used to get a value that indicates whether the SqlDataReader contains one or more rows. |
| IsClosed | It is used to retrieve a boolean value that indicates whether the specified SqlDataReader instance has been closed. |
What are 3 ways to get a count of the number of records in a table?
SwePeso
- select sum(1) from table1.
- select count(*) from table1.
- update table1 set col1 = col1; select @@rowcount. Peter Larsson. Helsingborg, Sweden. khtan. In (Som, Ni, Yak) 17689 Posts.
How do I count records in SQL?
SQL COUNT() Function
- SQL COUNT(column_name) Syntax. The COUNT(column_name) function returns the number of values (NULL values will not be counted) of the specified column:
- SQL COUNT(*) Syntax. The COUNT(*) function returns the number of records in a table:
- SQL COUNT(DISTINCT column_name) Syntax.
Is ADO.NET still used?
So yes: there’s definitely still room for “classic” ADO.NET to “fill the gaps” where EF/L2S or other technologies don’t really offer anything useful.
What is ADO.NET and its features?
As the name implies, ADO.NET is an extension built upon the existing, traditional ADO object model. ADO.NET focuses on disconnected data. ADO.NET allows strongly typed language. ADO.NET works with hierarchical and relational data through XML.
How to get the number of rows in sqldatareader?
The SQLDataReader doesn’t have a row count property the easiest way to get the count would be to do this… lblMsg.Text = string .Format ( “Number of rows: {0}” , count); // <—- and here. I thought about it but I’m not sure on how to do that. Every example given to you will work in .NET 2.0 and above.
Do you need a while loop in sqldatareader?
You don’t need while loop to fill the grid from SqlDataReader. Just check if reader has rows and set the datasource, so remove while loop. Also there is no property of DataGrid to get data rows directly. As i remember there is to convert it’s datasource to DataView and get the view’s Rows.Count value.
What are the names of the cards in Solitaire?
The rank of cards in Solitaire games is: K (high), Q, J, 10, 9, 8, 7, 6, 5, 4, 3, 2, A (low).
How to get the number of rows in SQL?
Answers. The SQLDataReader doesn’t have a row count property the easiest way to get the count would be to do this… lblMsg.Text = string .Format ( “Number of rows: {0}” , count); // <—- and here.