protected virtual string GetUpdateCriteriaParameterNameList <TTableObject>(WhereClauseBuilder <TTableObject> whereClauseBuilder, UpdateCriteria <TTableObject> updateCriteria)
where TTableObject : class, new()
{
return(string.Join(", ", updateCriteria.Select(uc => $"{uc.Key}={whereClauseBuilder.ParameterChar}u_{uc.Key}")));
}
protected virtual IEnumerable <DbParameter> GetUpdateCriteriaParameterList <TTableObject>(UpdateCriteria <TTableObject> updateCriteria)
where TTableObject : class, new()
{
foreach (var criteria in updateCriteria)
{
var key = $"u_{criteria.Key}";
var dbParameter = this.CreateParameter();
dbParameter.ParameterName = key;
dbParameter.Value = criteria.Value;
yield return(dbParameter);
}
}
private async Task DoUpdateAsync <TTableObject>(DbConnection connection, DbTransaction transaction, UpdateCriteria <TTableObject> updateCriteria, Specification <TTableObject> specification) where TTableObject : class, new()
{
var whereClauseBuilder = this.CreateWhereClauseBuilder <TTableObject>();
var sql = $"UPDATE {GetTableName<TTableObject>()} SET {GetUpdateCriteriaParameterNameList<TTableObject>(whereClauseBuilder, updateCriteria)}";
WhereClauseBuildResult whereClauseBuildResult = null;
if (specification != null)
{
whereClauseBuildResult = whereClauseBuilder.BuildWhereClause(specification);
sql = $"{sql} WHERE {whereClauseBuildResult.WhereClause}";
}
using (var command = this.CreateCommand(sql, connection))
{
if (transaction != null)
{
command.Transaction = transaction;
}
command.Parameters.Clear();
var updateParameters = GetUpdateCriteriaParameterList <TTableObject>(updateCriteria);
foreach (var parameter in updateParameters)
{
command.Parameters.Add(parameter);
}
if (whereClauseBuildResult != null)
{
foreach (var kvp in whereClauseBuildResult.ParameterValues)
{
var parameter = this.CreateParameter();
parameter.ParameterName = kvp.Key;
parameter.Value = kvp.Value;
command.Parameters.Add(parameter);
}
}
await command.ExecuteNonQueryAsync();
}
}