/// <summary>
/// 创建新的XmlCommand对象。
/// </summary>
/// <param name="name">命令名字</param>
/// <param name="argsObject">匿名对象表示的参数</param>
/// <param name="replaces">替换的关键字字典</param>
public XmlCommand(string name, object argsObject, Dictionary <string, string> replaces)
{
if (string.IsNullOrEmpty(name))
{
throw new ArgumentNullException("name");
}
XmlCommandItem command = XmlCommandManager.GetCommand(name);
if (command == null)
{
throw new ArgumentOutOfRangeException("name", string.Format("指定的XmlCommand名称 {0} 不存在。", name));
}
// 根据XML的定义以及传入参数，生成IDictionary
IDictionary <string, object> parameters = GetParameters(command, argsObject);
// 创建CPQuery实例
StringBuilder commandText = new StringBuilder(command.CommandText);
if (replaces != null)
{
foreach (KeyValuePair <string, string> kvp in replaces)
{
commandText.Replace(kvp.Key, kvp.Value);
}
}
_query.SetParam(parameters);
_query.SqlBuilder.Append(commandText.ToString());
}
/// <summary>
/// 根据XmlCommandItem对象，返回OracleParameter对象数组
/// </summary>
/// <param name="command">XmlCommandItem对象实例</param>
/// <param name="argsObject">匿名对表示的数据库参数</param>
/// <returns>OracleParameter对象数组</returns>
private IDictionary <string, object> GetParameters(XmlCommandItem command, object argsObject)
{
IDictionary <string, object> result = new Dictionary <string, object>();
if (command == null)
{
throw new ArgumentNullException("command");
}
if (argsObject == null || command.Parameters.Count == 0)
{
return(result);
}
PropertyInfo[] properties = argsObject.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public);
// 赋值。
foreach (PropertyInfo pInfo in properties)
{
string name = ":" + pInfo.Name;
XmlCmdParameter p = command.Parameters.FirstOrDefault(x => string.Compare(x.Name, name, StringComparison.OrdinalIgnoreCase) == 0);
// 如果传入了在XML中没有定义的参数项，则会抛出异常。
if (p == null)
{
throw new ArgumentException(string.Format("传入的参数对象中，属性 {0} 没有在XML定义对应的参数名。", pInfo.Name));
}
result.Add(p.Name, pInfo.FastGetValue(argsObject) ?? DBNull.Value);
}
return(result);
}
