public bool ExecuteCommand(ValidationResults validationResults, DataItem item, IDictionary paramvalues)
{
IRuleCommand cmd = BuildCommand(item, paramvalues);
if (cmd != null)
{
return(cmd.Execute(validationResults));
}
else
{
validationResults.AddResult(new ValidationResult("创建自定义验证规则失败", ""));
return(false);
}
}
public IRuleCommand BuildCommand(DataItem item, IDictionary values)
{
// TODO: currently only support sql. by alex@20080820
RuleCommand = new SqlRuleCommand(Name, CommandText, "", Message);
// build parameters
foreach (XmlAttribute p in Parameters)
{
if (string.IsNullOrEmpty(p.Value) ||
(!(p.Value.StartsWith("field[") && p.Value.EndsWith("]")) &&
!(p.Value.StartsWith("const[") && p.Value.EndsWith("]")) &&
!(p.Value.StartsWith("param[") && p.Value.EndsWith("]"))))
{
continue;
}
RuleCommandParameter param = new RuleCommandParameter();
param.Name = p.Name;
param.Text = p.Value;
// TODO: refactoring & handling the type of 'param[...]'
if (p.Value.StartsWith("field["))
{
// value from dataitem
string fieldname = p.Value.Substring(6, p.Value.Length - 7);
if (fieldname.Length == 0)
{
// should we throw exception here?
Logger.Instance.Info(this, "没有定义有效的field");
return(null);
//continue;
}
if (item[fieldname] == null)
{
// should we throw exception here?
Logger.Instance.Info(this, string.Format("该fieldname'{0}'没有对应的field", fieldname));
return(null);
//continue;
}
param.Value = item[fieldname].Value;
RuleCommand.Parameters.Add(param);
}
else if (p.Value.StartsWith("const["))
{
// value from const value
string constvalue = p.Value.Substring(6, p.Value.Length - 7);
if (constvalue.Length == 0)
{
// should we throw exception here?
Logger.Instance.Info(this, "没有定义有效的const");
return(null);
//continue;
}
param.Value = constvalue;
RuleCommand.Parameters.Add(param);
}
else if (p.Value.StartsWith("param["))
{
// value form param
string paramname = p.Value.Substring(6, p.Value.Length - 7);
if (values == null)
{
// should we throw exception here?
Logger.Instance.Info(this, "没有获得有效的参数集合");
return(null);
//continue;
}
if (string.IsNullOrEmpty(paramname))
{
// should we throw exception here?
Logger.Instance.Info(this, "没有定义有效的参数名称");
return(null);
//continue;
}
object v = values[paramname];
if (v == null)
{
// should we throw exception here?
Logger.Instance.Info(this, string.Format("没有获得参数[{0}]对应的值", paramname));
return(null);
//continue;
}
param.Value = v;
RuleCommand.Parameters.Add(param);
}
}
return(RuleCommand);
}