Interface ICommandGenerator<T>
Iterface, which describes generating single-table commands that are used to commit changes made to a DbSet with the associated database.
Namespace: Kros.KORM.CommandGenerator
Assembly: Kros.KORM.dll
Syntax
public interface ICommandGenerator<T>Type Parameters
| Name | Description |
|---|---|
| T |
Methods
FillCommand(DbCommand, T, ValueGenerated)
Fills command's parameters with values from item.
Declaration
void FillCommand(DbCommand command, T item, ValueGenerated valueGenerated)Parameters
| Type | Name | Description |
|---|---|---|
| System.Data.Common.DbCommand | command | Command which parameters are filled. |
| T | item | Item, from which command is filled. |
| ValueGenerated | valueGenerated | Indicates when a value for a property will be generated by the database. |
Exceptions
| Type | Condition |
|---|---|
| System.ArgumentNullException | Either |
GetColumnValue(ColumnInfo, T, ValueGenerated)
Gets value from the specific column.
Declaration
object GetColumnValue(ColumnInfo columnInfo, T item, ValueGenerated valueGenerated)Parameters
| Type | Name | Description |
|---|---|---|
| ColumnInfo | columnInfo | The specific column. |
| T | item | The item whose value will be returned. |
| ValueGenerated | valueGenerated | Indicates when a value for a property will be generated by the database. |
Returns
| Type | Description |
|---|---|
| System.Object | Value from the specific column. |
GetDeleteCommand()
Gets the automatically generated DbCommand object required to perform deletions on the database.
Declaration
DbCommand GetDeleteCommand()Returns
| Type | Description |
|---|---|
| System.Data.Common.DbCommand | Delete command. |
Exceptions
| Type | Condition |
|---|---|
| MissingPrimaryKeyException | GetDeleteCommand doesn't supported when entity doesn't have primary key. |
GetDeleteCommand(WhereExpression)
Get delete command with specific condition.
Declaration
DbCommand GetDeleteCommand(WhereExpression whereExpression)Parameters
| Type | Name | Description |
|---|---|---|
| WhereExpression | whereExpression | Where condition for DELETE statement. |
Returns
| Type | Description |
|---|---|
| System.Data.Common.DbCommand | Delete command. |
GetDeleteCommands(IEnumerable)
Gets the automatically generated DbCommands object required to perform deletions on the database.
Declaration
IEnumerable<DbCommand> GetDeleteCommands(IEnumerable ids)Parameters
| Type | Name | Description |
|---|---|---|
| System.Collections.IEnumerable | ids | Items ids to delete. |
Returns
| Type | Description |
|---|---|
| System.Collections.Generic.IEnumerable<System.Data.Common.DbCommand> | Delete command collection. |
Exceptions
| Type | Condition |
|---|---|
| MissingPrimaryKeyException |
|
| CompositePrimaryKeyException | Table has composite primary key. |
GetInsertCommand()
Gets the automatically generated DbCommand object required to perform insertions on the database.
Declaration
DbCommand GetInsertCommand()Returns
| Type | Description |
|---|---|
| System.Data.Common.DbCommand | Insert command. |
GetQueryColumns(ValueGenerated)
Get columns for query.
Declaration
IEnumerable<ColumnInfo> GetQueryColumns(ValueGenerated valueGenerated)Parameters
| Type | Name | Description |
|---|---|---|
| ValueGenerated | valueGenerated | Indicates when a value for a property will be generated byt the database. |
Returns
| Type | Description |
|---|---|
| System.Collections.Generic.IEnumerable<ColumnInfo> |
GetUpdateCommand()
Gets the automatically generated DbCommand object required to perform updates on the database
Declaration
DbCommand GetUpdateCommand()Returns
| Type | Description |
|---|---|
| System.Data.Common.DbCommand | Update command. |
Exceptions
| Type | Condition |
|---|---|
| MissingPrimaryKeyException | GetUpdateCommand doesn't supported when entity doesn't have primary key. |