private EntityProperties GetPrimaryKeyProperties(DataEntity dataEntity, OleDbMetadataAccess metadataAccess)
{
var primaryKeyProperties = new EntityProperties();
//Use the data entity name to retrieve a list of indexes
var indexColumns = metadataAccess.GetTableIndexInformation(dataEntity.ObjectDefinitionFullName);
//Add each of the Primary Keys and their values found in the data entity.
foreach (DataRow row in indexColumns.Rows)
{
if (!Convert.ToBoolean(row["PRIMARY_KEY"]))
{
continue;
}
var columnName = row["COLUMN_NAME"].ToString();
// Check if the priamry key column is included in the data entity.
if (dataEntity.Properties.ContainsKey(columnName))
{
// Add the key and its value to the primary key list.
primaryKeyProperties.Add(columnName, dataEntity.Properties[columnName]);
}
else
{
// If the key has not been added set it to null.
primaryKeyProperties.Add(columnName, null);
}
}
return(primaryKeyProperties);
}
/// <summary>
/// Retrieves a list of column definitions for the specified table name.
/// </summary>
/// <param name="tableName">Name of the table to retrieve the properties for</param>
/// <returns></returns>
private List <IPropertyDefinition> GetTableProperties(string tableName)
{
List <IPropertyDefinition> properties = new List <IPropertyDefinition>();
//retrieve the table's index information
DataTable tableIndexDefinition =
_metadataAccess.GetTableIndexInformation(tableName);
//retrieve the table's column information
DataTable columnDefinitions =
_metadataAccess.GetColumnDefinitions(tableName);
//parse through each of the table indexes and set the primary key value
List <string> primaryKeys =
(from DataRow tableIndex in tableIndexDefinition.Rows
where Convert.ToBoolean(tableIndex["PRIMARY_KEY"])
select tableIndex["COLUMN_NAME"].ToString()).ToList();
//parse through the column information and set each property definition
foreach (DataRow columnDefinition in columnDefinitions.Rows)
{
//get the property defintion using the column information
var propertyDefinition = SetPropertyDefinition(columnDefinition, tableIndexDefinition,
primaryKeys.Contains(
columnDefinition["COLUMN_NAME"].ToString()));
properties.Add(propertyDefinition);
}
return(properties);
}
private EntityProperties GetPrimaryKeyProperties(DataEntity dataEntity, OleDbMetadataAccess metadataAccess)
{
var primaryKeyProperties = new EntityProperties();
//Use the data entity name to retrieve a list of indexes
var indexColumns = metadataAccess.GetTableIndexInformation(dataEntity.ObjectDefinitionFullName);
//Add each of the Primary Keys and their values found in the data entity.
foreach (DataRow row in indexColumns.Rows)
{
if (!Convert.ToBoolean(row["PRIMARY_KEY"]))
{
continue;
}
var columnName = row["COLUMN_NAME"].ToString();
// Check if the priamry key column is included in the data entity.
if (dataEntity.Properties.ContainsKey(columnName))
{
// Add the key and its value to the primary key list.
primaryKeyProperties.Add(columnName, dataEntity.Properties[columnName]);
}
else
{
// If the key has not been added set it to null.
primaryKeyProperties.Add(columnName, null);
}
}
return primaryKeyProperties;
}
