Update dataadapter c#

Privacy policy. Thank you. Microsoft makes no warranties, express or implied, with respect to the information provided here. Gets or sets a Transact-SQL statement or stored procedure used to update records in the data source.

It assumes you have already created a SqlConnection object. During Update , if this property is not set and primary key information is present in the DataSet , the UpdateCommand can be generated automatically if you set the SelectCommand property and use the SqlCommandBuilder.

Then, any additional commands that you do not set are generated by the SqlCommandBuilder. This generation logic requires key column information to be present in the DataSet.

For more information, see Generating Commands with CommandBuilders. NET data provider included with the. A DataAdapter is used to retrieve data from a data source and populate tables within a DataSet.

The DataAdapter also resolves changes made to the DataSet back to the data source. The DataAdapter uses the Connection object of the. NET data provider to connect to a data source, and Command objects to retrieve data from and resolve changes to the data source. The SelectCommand property of the DataAdapter is a Command object that retrieves data from the data source.

The InsertCommand, UpdateCommand, and DeleteCommand properties of the DataAdapter are Command objects that manage updates to the data in the data source according to modifications made to the data in the DataSet. Fill takes as its arguments a DataSet to be populated, and a DataTable object, or the name of the DataTable to be filled with the rows returned from the SelectCommand.

The Fill method uses the DataReader object implicitly to return the column names and types used to create the tables in the DataSet, as well as the data to populate the rows of the tables in the DataSet. Tables and columns are only created if they do not already exist; otherwise Fill uses the existing DataSet schema.

Column types are created as. NET Framework types according to the tables in Mapping. Net Data Provider Data Types to. Primary keys are not created unless they exist in the data source and DataAdapter. If Fill finds that a primary key exists for a table, it will overwrite data in the DataSet with data from the data source for rows where the primary key column values match those of the row returned from the data source.

If no primary key is found, the data is appended to the tables in the DataSet. Fill uses any TableMappings that may exist when populating the DataSet. Fill customerDS, "Customers" ; nwindConn. The Fill method implicitly opens the Connection that the DataAdapter is using if it finds that the connection is not already open.

If Fill opened the connection, it will also close the connection when Fill is finished. This can simplify our code when dealing with a single operation such as a Fill or an Update. However, if we are performing multiple operations that require an open connection, we can improve the performance of our application by explicitly calling the Open method of the Connection, performing the operations against the data source, then calling the Close method of the Connection.

We should strive to keep connections to the data source open for a minimal amount of time to free up the resource to be used by other client applications. The tables will be given an incremental default name of TableN, starting with "Table" for Table0. If a table name is passed as an argument to the Fill method, the tables will be given an incremental default name of TableNameN, starting with "TableName" for TableName0.

Each DataAdapter can be used to fill one or more DataTable objects and resolve updates back to the relevant data source. DataRelation and Constraint objects can be added to the DataSet locally, enabling we to relate data from multiple dissimilar data sources.

One or more DataAdapter objects can handle communication to each data source. The following code example populates a list of customers from the Northwind database on Microsoft SQL Server , and a list of orders from the Northwind database stored in Microsoft Access The filled tables are related with a DataRelation, and the list of customers is then displayed with the orders for that customer.

Open ; orderConn. Fill customerDS, "Orders" ; custConn. Close ; orderConn. Add "CustOrders" , customerDS. Tables[ "Customers" ]. Tables[ "Orders" ]. NET Framework data types. For most applications, these provide a convenient representation of data source information. However, this representation may cause a problem when the data type in the data source is a SQL Server decimal.

NET Framework decimal data type allows a maximum of 28 significant digits, while the SQL Server decimal data type allows 38 significant digits. If the SqlDataAdapter determines, during a Fill operation, that the precision of a SQL Server decimal field is greater than 28 characters, the current row will not be added to the DataTable.

Instead the FillError event will occur, which enables you to determine if a loss of precision will occur, and respond appropriately. When the DataAdapter encounters a chaptered column during a Fill operation, a DataTable is created for the chaptered column, and that table is filled with the columns and rows from the chapter. The table created for the chaptered column is named using both the parent table name and the chaptered column name in the form "ParentTableNameChapteredColumnName".

If a table already exists in the DataSet that matches the name of the chaptered column, the current table is filled with the chapter data.

GetValue 4. ToString ; tbRCook. GetValue 5. ToString ; tbRDirections. GetValue 6. ToString ; tbRYield. GetValue 7. ToString ; textBox1.

GetValue 8. Show "That's the last recipe of your Cook Book! Show "This is the first recipe of your Cook Book! Text; if MessageBox. Show "You wish to save your updates? Update dataRecipe, "CookBookRecipes" ; I'm not getting any errors, but the data table just won't update. Thanks in advance for your help, and just let me know if you need more information. Nikolay Kostov Miffed Miffed 1 1 gold badge 1 1 silver badge 3 3 bronze badges. Did you ever get an answer on this? I am having the same problem with a project I built to handle my Db updates.

Using it from one project, it fails just as you note. Using it from another, it works fine. So I'm really stumped. I have even compared the SqlAdapter. CommandText from the two and they are exactly the same as are the ItemArray data elements. RowStates are also the same. Add a comment. Active Oldest Votes. GetDeleteCommand true ; dataAdapt. GetUpdateCommand true ; dataAdapt. GetInsertCommand true ;. Daniel Santos Daniel Santos 1, 14 14 silver badges 38 38 bronze badges.

Thanks for this. Documentation — nicV. Tom Studee Tom Studee 10k 3 3 gold badges 36 36 silver badges 41 41 bronze badges. Where would I put that? Try the below source. AddRow daRow ; daRow.