/// <summary>
/// 根据对象创建参数列表,使用<see cref="ParameterChar"/>所指定的参数前缀
/// </summary>
/// <param name="entity">对象</param>
protected virtual IDbDataParameter[] CreateParameter(DbEntity entity)
{
int i = 0;
int size = entity.GetInitializePropertyCount();
Dictionary <string, object> .Enumerator etor = entity.GetEnumerator();
IDbDataParameter[] parameters = new IDbDataParameter[size];
while (etor.MoveNext())
{
parameters[i] = this.CreateParameter(string.Concat(ParameterChar, etor.Current.Key), etor.Current.Value);
i++;
}
return(parameters);
//Dictionary<string, object>.Enumerator etor = entity.GetEnumerator();
//List<IDbDataParameter> list = new List<IDbDataParameter>();
//if (entity.IsSetFieldLength())
//{
// while (etor.MoveNext())
// list.Add(this.CreateParameter(string.Concat(ParameterChar, etor.Current.Key), etor.Current.Value,entity.GetFieldLength(etor.Current.Key)));
//}
//else
//{
//while (etor.MoveNext())
// list.Add(this.CreateParameter(string.Concat(ParameterChar, etor.Current.Key), etor.Current.Value));
//}
//return list;
}
/// <summary>
/// get insert sql
/// </summary>
/// <param name="entity"></param>
/// <param name="parameters"></param>
public virtual String GetInsert(DbEntity entity, out IDbDataParameter[] parameters)
{
parameters = null;
var parameterList = new List <IDbDataParameter>(entity.GetInitializePropertyCount());
var filed = new StringBuilder();
var values = new StringBuilder();
//object property
Dictionary <string, object> .Enumerator etor = entity.GetEnumerator();
//Type type;
while (etor.MoveNext())
{
filed.Append("," + etor.Current.Key);
values.AppendFormat(",{0}{1}", Factory.ParameterChar, etor.Current.Key);
parameterList.Add(Factory.CreateParameter(etor.Current.Key, etor.Current.Value));
}
parameters = parameterList.ToArray();
//remove comma
if (filed.Length > 0)
{
filed = filed.Remove(0, 1);
values = values.Remove(0, 1);
}
else
{
return(null);
}
return(string.Format("INSERT INTO {0} ({1}) VALUES ({2})", entity.GetTableName(), filed.ToString(), values.ToString()));
}
/// <summary>
/// get update sql
/// </summary>
/// <param name="where">更新条件</param>
/// <param name="update"></param>
/// <param name="parameters"></param>
public virtual String GetUpdate(DbEntity update, DbEntity where, out IDbDataParameter[] parameters)
{
parameters = null;
var parameterList = new List <IDbDataParameter>(update.GetInitializePropertyCount() + where.GetInitializePropertyCount());
StringBuilder tmp = new StringBuilder();
//object property
Dictionary <string, object> .Enumerator etor = update.GetEnumerator();
//Type type;
while (etor.MoveNext())
{
tmp.AppendFormat(",{0}={1}{0}", etor.Current.Key, Factory.ParameterChar);
parameterList.Add(Factory.CreateParameter(etor.Current.Key, etor.Current.Value));
}
string result = null;
if (tmp.Length > 0)
{
IDbDataParameter[] whereParameters = null;
result = string.Format("UPDATE {0} SET {1}{2}", update.GetTableName(), tmp.Remove(0, 1).ToString(), this.GetWhere(where, out whereParameters));
if (whereParameters != null)
{
parameterList.AddRange(whereParameters);
}
}
parameters = parameterList.ToArray();
return(result);
}
/// <summary>
/// get object where
/// </summary>
/// <param name="where">指定的条件生成对象</param>
/// <param name="parameters"></param>
public virtual String GetWhere(DbEntity where, out IDbDataParameter[] parameters)
{
var i = 0;
parameters = new IDbDataParameter[where.GetInitializePropertyCount()];
string selectRelation = where.GetWhereRelation() == WhereRelation.AND ? " AND " : " OR ";
string[] selectRelations = new string[parameters.Length];
var etor = where.GetEnumerator();
//
while (etor.MoveNext())
{
selectRelations[i] = string.Format("{0}={1}{0}", etor.Current.Key, Factory.ParameterChar);
parameters[i] = Factory.CreateParameter(etor.Current.Key, etor.Current.Value);
i++;
}
//
if (i > 0)
{
return(string.Concat(" WHERE ", string.Join(selectRelation, selectRelations)));
}
return(string.Empty);
}
/// <summary>
/// 获取查询条件
/// </summary>
/// <param name="where">指定的条件生成对象</param>
/// <param name="parameters"></param>
public override String GetWhere(DbEntity where, out IDbDataParameter[] parameters)
{
var parameterList = new List <IDbDataParameter>(where.GetInitializePropertyCount());
string selectRelation = where.GetWhereRelation() == WhereRelation.AND ? " AND" : " OR";
var etor = where.GetEnumerator();
var build = new StringBuilder();
//Type type;
while (etor.MoveNext())
{
build.Append(selectRelation);
if (etor.Current.Value != null && etor.Current.Value is DateTime)
{
build.AppendFormat("{0}=#{1}#", etor.Current.Key, etor.Current.Value);
}
else
{
build.AppendFormat("{0}={1}{0}", etor.Current.Key, Factory.ParameterChar);
parameterList.Add(Factory.CreateParameter(etor.Current.Key, etor.Current.Value));
}
}
parameters = parameterList.ToArray();
if (build.Length > 0)
{
return(string.Concat(" WHERE ", build.Remove(0, selectRelation.Length).ToString()));
}
return(string.Empty);
}
