DbCommandBuilder.GetUpdateCommand Method
Definition
Important
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Gets the automatically generated DbCommand object required to perform updates at the data source.
Overloads
| GetUpdateCommand() |
Gets the automatically generated DbCommand object required to perform updates at the data source. |
| GetUpdateCommand(Boolean) |
Gets the automatically generated DbCommand object required to perform updates at the data source, optionally using columns for parameter names. |
Remarks
An application can use the GetUpdateCommand method for informational or troubleshooting purposes because it returns the DbCommand object to be executed.
You can also use GetUpdateCommand as the basis of a modified command. For example, you might call GetUpdateCommand and modify the command text, and then explicitly set that on the DbDataAdapter.
After the SQL statement is first generated, the application must explicitly call RefreshSchema if it changes the statement in any way. Otherwise, the GetUpdateCommand will still be using information from the previous statement, which might not be correct. The SQL statements are first generated either when the application calls Update or GetUpdateCommand.
The default behavior, when generating parameter names, is to use @p1, @p2, and so on for the various parameters. If the overloaded version of GetUpdateCommand allows you to specify this behavior, you can cause the DbCommandBuilder to generate parameters based on the column names instead.
GetUpdateCommand()
- Source:
- DBCommandBuilder.cs
- Source:
- DBCommandBuilder.cs
- Source:
- DBCommandBuilder.cs
Gets the automatically generated DbCommand object required to perform updates at the data source.
public:
System::Data::Common::DbCommand ^ GetUpdateCommand();public System.Data.Common.DbCommand GetUpdateCommand ();member this.GetUpdateCommand : unit -> System.Data.Common.DbCommandPublic Function GetUpdateCommand () As DbCommandReturns
The automatically generated DbCommand object required to perform updates.
Remarks
An application can use the GetUpdateCommand method for informational or troubleshooting purposes because it returns the DbCommand object to be executed.
You can also use GetUpdateCommand as the basis of a modified command. For example, you might call GetUpdateCommand and modify the command text, and then explicitly set that on the DbDataAdapter.
After the SQL statement is first generated, the application must explicitly call RefreshSchema if it changes the statement in any way. Otherwise, the GetUpdateCommand will still be using information from the previous statement, which might not be correct. The SQL statements are first generated either when the application calls Update or GetUpdateCommand.
See also
Applies to
GetUpdateCommand(Boolean)
- Source:
- DBCommandBuilder.cs
- Source:
- DBCommandBuilder.cs
- Source:
- DBCommandBuilder.cs
Gets the automatically generated DbCommand object required to perform updates at the data source, optionally using columns for parameter names.
public:
System::Data::Common::DbCommand ^ GetUpdateCommand(bool useColumnsForParameterNames);public System.Data.Common.DbCommand GetUpdateCommand (bool useColumnsForParameterNames);member this.GetUpdateCommand : bool -> System.Data.Common.DbCommandPublic Function GetUpdateCommand (useColumnsForParameterNames As Boolean) As DbCommandParameters
- useColumnsForParameterNames
- Boolean
If true, generate parameter names matching column names, if possible. If false, generate @p1, @p2, and so on.
Returns
The automatically generated DbCommand object required to perform updates.
Remarks
An application can use the GetUpdateCommand method for informational or troubleshooting purposes because it returns the DbCommand object to be executed.
You can also use GetUpdateCommand as the basis of a modified command. For example, you might call GetUpdateCommand and modify command text, and then explicitly set that on the DbDataAdapter.
After the SQL statement is first generated, the application must explicitly call RefreshSchema if it changes the statement in any way. Otherwise, the GetUpdateCommand will still be using information from the previous statement, which might not be correct. The SQL statements are first generated either when the application calls Update or GetUpdateCommand.
The default behavior, when generating parameter names, is to use @p1, @p2, and so on for the various parameters. Passing true for the useColumnsForParameterNames parameter allows you to force the DbCommandBuilder to generate parameters based on the column names instead. Generation of the parameters based on column names succeeds only if the following conditions are met:
The ParameterNameMaxLength has been specified and its length is equal to or greater than the generated parameter name.
The generated parameter name meets the criteria specified in the ParameterNamePattern regular expression.
A ParameterMarkerFormat is specified.
