Tài liệu Selecting the Top n Rows in a DataTable doc
Tài liệu Selecting the Top n Rows in a DataTable doc
... Team LiB ]
Recipe 3.10 Selecting the Top n Rows in a DataTable
Problem
You want to create a grid that shows the t op five rows in a DataTable, based on the
values in one of the columns. ...
Solution
Use an appropriate sort order with a DataView filter.
The sample code contains two event handlers:
Form.Load
Sets up the sample by creating a D...
Tài liệu Finding, Filtering, and Sorting Rows in a DataTable ppt
... objects in a DataTable.
Finding a DataRow in a DataTable
To find a DataRow in a DataTable, you follow these steps:
1. Retrieve the rows from the database into your DataTable.
2. Set the PrimaryKey ...
Finding, Filtering, and Sorting Rows in a DataTable
Each row in a DataTable is stored in a DataRow object, and in this section you'll...
Tài liệu Determining the Length of Columns in a SQL Server Table doc
... col.Unique +
Environment.NewLine);
schemaInfo.Append("\tOther: " + colInfo[col.ColumnName] +
Environment.NewLine);
schemaInfo.Append(Environment.NewLine);
}
schemaInfo.Append(Environment.NewLine); ... collection in the table.
foreach(DataColumn col in dt.Columns)
{
// Get column information.
schemaInfo.Append("\tCOLUMN: " + col.ColumnName +
Envi...
Tài liệu Using XPath to Query Data in a DataSet doc
... SelectNodes( ).
The sample code contains two event handlers:
Form.Load
Sets up the sample by creating a DataSet containing the Orders table and Order
Details table from Northwind and a nested ...
// Namespaces, variables, and constants
using System;
using System.Configuration;
using System.Windows.Forms;
using System.Text;
using System.Xml;
using System.Data;
using System...
Tài liệu Modifying Rows in a DataTable phần 1 ppt
...
DeleteCommand properties of a DataAdapter.
Setting the InsertCommand Property of a DataAdapter
The following example creates a SqlCommand object named myInsertCommand that
contains an INSERT statement: ... of a DataAdapter
The following example creates a SqlCommand object named myUpdateCommand that
contains an UPDATE statement and sets the UpdateCommand property of
mySq...
Tài liệu Modifying Rows in a DataTable phần 2 docx
... Update(DataRow[] myDataRows, DataTableMapping myDataTableMapping)
int Update(DataSet myDataSet, string dataTableName)
where dataTableName is a string containing the name of the DataTable to update. ... programs to find the right balance.
The Update() method is overloaded as follows:
int Update(DataRow[] myDataRows)
int Update(DataSet myDataSet)
int Update (DataTable myData...
Tài liệu The top ten algorithms in data mining docx
... V. Raghavan, Rajeev
Rastogi, Salvatore J. Stolfo, Alexander Tuzhilin, and Benjamin W. Wah),
10 challenging problems in data mining research, International Journal of
Information Technology & ... of considerable interest in
recent yearsin thedevelopmentof algorithmsinvariousapplication areassuchas data
mining, machine learning, and pattern recognition [20, 27, 28]. The seminal paper...
Tài liệu KRONE - the effect of Errors in TCP applications performance (full) pdf
... would add its header and pass it to the network
interface card (NIC), for instance an Ethernet card.
Finally, the Ethernet card would be responsible for
sending the total Ethernet frame onto the network.
That ... the manager is not able to purchase
additional time to solve the delay problem.
In the TCP/IP environment, we learned that Ethernet
and IP operate in a connection...
Tài liệu Accessing Deleted Rows in a DataTable pptx
... rows.
The sample code contains three event handlers:
Form.Load
Sets up the sample by creating a DataTable containing Orders data from
Northwind. A view containing the Current rows is bound ... to the collection of rows in a DataTable.
Modified
The data in the row has been changed but AcceptChanges( ) has not been
called.
Unchanged
The data in the row...
Tài liệu Finding Rows in a DataView doc
... columns that are not part of the primary key.
The sample code contains two event handlers:
Form.Load
Sets up the sample by creating a DataTable containing the Orders table from the
Northwind ... no
match is found) while FindRows( ) returns a DataRowView array of all matching rows
(or an empty array if no match is found). The DataRow for a DataRowView can be
accesse...