public static void Update <T>(this ISqlConnectionProvider sqlConnectionProvider,
T objectToUpdate,
Expression <Func <T, object> > keyProperties = null,
string tableName = null,
string schemaName = null,
bool processColumnNames = true)
{
tableName = SqlTextFunctions.GetTableName(objectToUpdate.GetType(), tableName, schemaName);
using (var myConnection = sqlConnectionProvider.ToSqlConnection())
{
using (var myCommand = new SqlCommand {
Connection = myConnection
})
{
var setClauseProperties = SqlClrHelpers.GetRelevantPropertyInfos(objectToUpdate, null);
var whereClauseProperties = SqlClrHelpers.GetPropertiesFromObject(objectToUpdate, keyProperties);
SqlTextFunctions.UnUnderscoreColumnNames = processColumnNames;
BuildOutUpdateCommand(objectToUpdate,
tableName,
setClauseProperties,
whereClauseProperties,
myCommand,
processColumnNames);
SqlTextFunctions.UnUnderscoreColumnNames = true;
myConnection.Open();
SqlLogger.LogSqlCommand(myCommand);
myCommand.ExecuteNonQuery();
myConnection.Close();
}
}
}
private static void BuildOutMyCommand <T>(T objToDelete, Expression <Func <T, object> > keyProperties, string tableName, SqlCommand myCommand)
{
var whereClauseProperties = SqlClrHelpers.GetPropertiesFromObject(objToDelete, keyProperties);
var whereClauseColumnNames = whereClauseProperties.Select(SqlTextFunctions.GetColumnNameFromPropertyInfo).ToList();
var whereClauseParameterNames = whereClauseProperties.Select(SqlTextFunctions.GetParameterName).ToList();
var whereClauseParts = Enumerable
.Range(0, whereClauseColumnNames.Count)
.Select(index => $"{whereClauseColumnNames[index]} = {whereClauseParameterNames[index]}");
var whereClause = string.Join(" AND ", whereClauseParts);
var whereClauseParameters = Enumerable
.Range(0, whereClauseProperties.Count)
.Select(
index => SqlTextFunctions.GetParameter(objToDelete, whereClauseProperties[index], whereClauseParameterNames[index]))
.ToList();
myCommand.Parameters.AddRange(whereClauseParameters.ToArray());
myCommand.CommandText = $"DELETE FROM {tableName} WHERE {whereClause}";
}
