protected override void ExecuteSql(DataBaseCommand baseCommand)
{
var connection = GetConnection;
var command = CreateCommand(baseCommand, connection);
command.Connection = connection;
command.ExecuteNonQuery();
}
private SqlCommand CreateCommand(DataBaseCommand baseCommand, SqlConnection connection)
{
var command = connection.CreateCommand();
var type = baseCommand.GetType().Name;
string sqlSentence;
switch (type)
{
case "InsertCommand":
var insertCommand = (InsertCommand)baseCommand;
if (insertCommand.InsertPairs.Count == 0)
{
sqlSentence = "INSERT INTO " + insertCommand.TableName;
command.CommandText = sqlSentence;
}
else
{
sqlSentence = "INSERT INTO " + insertCommand.TableName + " (";
sqlSentence = insertCommand.InsertPairs
.Aggregate(sqlSentence, (current, column) => current + column.Column + ",");
sqlSentence = sqlSentence.TrimEnd(',');
sqlSentence += ") VALUES (";
sqlSentence = insertCommand.InsertPairs
.Aggregate(sqlSentence, (current, column) => current + "@" + column.Column + ",");
sqlSentence = sqlSentence.TrimEnd(',');
sqlSentence += ")";
command.CommandText = sqlSentence;
foreach (var t in insertCommand.InsertPairs)
{
command.Parameters.AddWithValue("@" + t.Column, t.Value);
}
}
break;
case "UpdateCommand":
var updateCommand = (UpdateCommand)baseCommand;
sqlSentence = "UPDATE " + updateCommand.TableName + " SET ";
sqlSentence = updateCommand.UpdatePairs
.Aggregate(sqlSentence,
(current, updatePair) => current + updatePair.Column + " = @" + updatePair.Column + ",");
sqlSentence = sqlSentence.TrimEnd(',');
sqlSentence += " WHERE ";
//暂时只需要针对有主键表的更新
var len = updateCommand.ConditionPairs.Count - 1;
for (var index = 0; index < len; index++)
{
var conditionPair = updateCommand.ConditionPairs[index];
sqlSentence += conditionPair.Column + " = @2" + conditionPair.Column + " AND ";
}
sqlSentence += updateCommand.ConditionPairs[len].Column + " = @2" +
updateCommand.ConditionPairs[len].Column;
command.CommandText = sqlSentence;
foreach (var ucConditionPair in updateCommand.ConditionPairs)
{
command.Parameters.AddWithValue("@2" + ucConditionPair.Column, ucConditionPair.Value);
}
foreach (var ucUpdatePair in updateCommand.UpdatePairs)
{
command.Parameters.AddWithValue("@" + ucUpdatePair.Column, ucUpdatePair.Value);
}
break;
case "DeleteCommand":
//只删除单个值匹配情况
var deleteCommand = (DeleteCommand)baseCommand;
sqlSentence = "DELETE FROM " + deleteCommand.TableName;
if (deleteCommand.ConditionPairs.Count == 0)
{
command.CommandText = sqlSentence;
break;
}
sqlSentence += " WHERE ";
len = deleteCommand.ConditionPairs.Count - 1;
for (var i = 0; i < len; ++i)
{
var pair = deleteCommand.ConditionPairs[i];
sqlSentence += pair.Column + " = @" + pair.Column + " AND ";
}
sqlSentence += deleteCommand.ConditionPairs[len].Column + " = @" +
deleteCommand.ConditionPairs[len].Column;
command.CommandText = sqlSentence;
foreach (var conditionPair in deleteCommand.ConditionPairs)
{
command.Parameters.AddWithValue("@" + conditionPair.Column, conditionPair.Value);
}
break;
default:
var selectCommand = (SelectCommand)baseCommand;
sqlSentence = "SELECT * FROM " + baseCommand.TableName;
if (selectCommand.ConditionPairs == null)
{
command.CommandText = sqlSentence;
break;
}
;
if (selectCommand.ConditionPairs.Count == 0)
{
command.CommandText = sqlSentence;
break;
}
sqlSentence += " WHERE ";
len = selectCommand.ConditionPairs.Count;
for (var i = 0; i < len - 1; ++i)
{
var pair = selectCommand.ConditionPairs[i];
sqlSentence += pair.Column + " = @" + pair.Column + " AND ";
}
sqlSentence += selectCommand.ConditionPairs[len - 1].Column + " = @" +
selectCommand.ConditionPairs[len - 1].Column;
command.CommandText = sqlSentence;
foreach (var conditionPair in selectCommand.ConditionPairs)
{
//command.Parameters.AddWithValue(, conditionPair.Value);
command.Parameters.Add(new SqlParameter("@" + conditionPair.Column, conditionPair.Value));
}
break;
}
#if output
Log.Write(sqlSentence);
#endif
return(command);
}