How to convert DataReader to DataTable in c#?

In the code below, a DataTable schema is created first using the GetSchemaTable() method of DataReader. The GetSchemaTable() returns a DataTable describing the column metadata of the IDataReader. Once done, we loop through the rows of the schema table and create a DataColumn object and set its properties.

How to convert DataRow to DataTable?

14 Answers Make sure your dataTable has the same schema as the DataRows in your DataRow array. DataTable dt = new DataTable(); DataRow[] dr = dt. Select(“Your string”); DataTable dt1 = dr. CopyToDataTable();

How to import DataRow into DataTable c#?

After you create a DataTable and define its structure using columns and constraints, you can add new rows of data to the table. To add a new row, declare a new variable as type DataRow. A new DataRow object is returned when you call the NewRow method.

How to add collection of DataRow to DataTable?

To create a new DataRow, you must use the NewRow method of the DataTable class. When you use the NewRow method, a new DataRow object is returned using the schema of parent DataTable. After you create the DataRow object and set the values for each of its columns, use the Add method to add the object to the collection.

Is DataReader faster than DataTable?

We ended up writing some benchmarks to test the speed differences. It was generally agreed that a DataReader is faster, but we wanted to see how much faster. The results surprised us. The DataTable was consistently faster than the DataReader.

What is DataRow C#?

A DataRow represent a row of data in data table. A DataRowCollection object represents a collection of data rows of a data table. You use DataTable’s NewRow method to return a DataRow object of data table, add values to the data row and add a row to the data Table again by using DataRowCollection’s Add method.

How do you create a DataSet to DataTable?

Convert DataSet to DataTable

1. DataSet ds;
2. DataTable dt= ds. Tables[0];

How do I copy a row from one DataTable to another in C#?

Copying Data from one DataTable to Another using ImportRow

1. For Each dr As DataRow In sourceTable. Rows.
2. r = destinationTable. NewRow.
3. r(“Name”) = dr(“Name”)
4. r(“City”) = dr(“City”)
5. r(“Cost”) = dr(“Cost”)
6. destinationTable. Rows. Add(r)
7. Next.

How do you create a DataRow?

To create a new DataRow, use the NewRow method of the DataTable object. After creating a new DataRow, use the Add method to add the new DataRow to the DataRowCollection. Finally, call the AcceptChanges method of the DataTable object to confirm the addition.

When should I use DataReader?

The DataReader provides an unbuffered stream of data that allows procedural logic to efficiently process results from a data source sequentially. The DataReader is a good choice when you’re retrieving large amounts of data because the data is not cached in memory.

Which is faster SqlDataAdapter and SqlDataReader?

A SqlDataAdapter is typically used to fill a DataSet or DataTable and so you will have access to the data after your connection has been closed (disconnected access). The SqlDataReader is a fast forward-only and connected cursor which tends to be generally quicker than filling a DataSet/DataTable.

Is there any way to extract datarow out the current row of a DataReader?

I understand a DataReader is more a collection of rows but it only read one row at the time. So my question: is there any way to extract a DataRow out the current row of a DataReader? Is there any way to extract a DataRow out the current row of a DataReader ? No, at least no simple way. Every DataRow belongs to one Table.

When to use itemarray to copy datarow?

Before deleting the row, i want to copy the row (which is to be deleted) and kept in another datatable. Is the above code correct or should ItemArray be used. If ItemArray has to be used, how to alter the above code. sameer_khanj…

When to use datarow instead of iterate on rows?

But as Tim pointed out, if you know in advance that you’re going to want the DataRow at each iteration, you should use DataTable instead, and then just iterate on its Rows property (following output is identical to above):

How to get a value from the itemarray?

So far, to get a value from the ItemArray I used to call it by an index. Is there any way to get the value within the ItemArray with a Linq expression based on the column name? Is this answer outdated? If you use the Item indexer rather than ItemArray, you can access items by column name, regardless of whether you use LINQ or not.