/// <summary>
/// 分解操作符为In的过滤参数，返回组合好的过滤条件表达式
/// </summary>
/// <param name="para"></param>
private static string GenerateConditionFromInParameter(FilterParameter para)
{
string formatString = " {0} {1} {2}";
StringBuilder expressions = new StringBuilder();
// 先用','作为分隔符，拆分出独立的条件
string[] separator1 = new string[] { "," };
string[] separator2 = new string[] { "～" };
string[] values = para.ParameterValue.ToString().Split(separator1, StringSplitOptions.None);
string[] rangs;
StringBuilder inValues = new StringBuilder(); // 保存In条件的单个值
foreach (string condition in values)
{
if (condition.Contains("～")) // 范围型转换为">=" 和 "<="两个条件
{
if (expressions.Length > 0)
{
expressions.Append(" OR ");
}
rangs = condition.Split(separator2, StringSplitOptions.None);
expressions.AppendFormat(CultureInfo.CurrentCulture
, " ({0} >= {1} AND {0} <= {2})"
, para.FieldName
, rangs[0], rangs[1]);
}
else if (condition.Contains("%")) // 含有"%"的转换为"like"条件
{
if (expressions.Length > 0)
{
expressions.Append(" OR ");
}
expressions.Append(String.Format(CultureInfo.CurrentCulture
, formatString
, para.FieldName
, CommonOperation.GetOperatorSign(CompareOperator.Like)
, condition));
}
else //其它的单个值保存下来作为In条件的值,最后统一加
{
if (inValues.Length > 0)
{
inValues.Append(',');
}
inValues.Append(condition);
}
}
if (inValues.Length > 0)
{
if (expressions.Length > 0)
{
expressions.Append(" OR ");
}
expressions.Append(String.Format(CultureInfo.CurrentCulture
, "{0} in ({1})"
, para.FieldName
, inValues.ToString()));
}
return("(" + expressions.ToString() + ")");
}
private void SetParameter(string parameterName, FilterParameter value)
{
//this.OnChange();
int num1 = this.IndexOf(parameterName);
if (num1 < 0)
{
throw new ArgumentOutOfRangeException(MessageStringManager.GetString("ParameterOutOfRange"));
}
this.Replace(num1, value);
}
/// <summary>
/// Clone
/// </summary>
/// <returns></returns>
public FilterParameter Clone()
{
FilterParameter cln = new FilterParameter();
cln.FieldName = this.FieldName;
cln.Caption = this.Caption;
cln.AllowUserEdit = this.AllowUserEdit;
cln.DataCatalog = this.DataCatalog;
cln.Description = this.Description;
cln.Enabled = this.Enabled;
cln.Operator = this.Operator;
//cln.ParameterValue = this.ParameterValue;
cln.Value = this.Value;
cln.IsString = this.IsString;
return(cln);
}
/// <summary>
/// 确定两个FilterParameter对象是否相同
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public override bool Equals(Object obj)
{
// If parameter is null, or cannot be cast to FilterParameter,
// return false.
if (obj == null)
{
return(false);
}
FilterParameter p = obj as FilterParameter;
if ((object)p == null)
{
return(false);
}
// Return true if the fields match:
return((FieldName == p.FieldName) &&
(Caption == p.Caption) &&
(IsString == p.IsString) &&
(Operator == p.Operator));
}
/// <summary>
/// 查找指定参数对象在List中的位置
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public int IndexOf(object value)
{
if (value != null)
{
ValidateType(value);
List <FilterParameter> list1 = this.InnerList;
FilterParameter temp = (FilterParameter)value;
if (list1 != null)
{
for (int num1 = 0; num1 < list1.Count; num1++)
{
if (temp == list1[num1])
{
return(num1);
}
}
}
}
return(-1);
}
/// <summary>
/// 查找指定参数对象在List中的位置
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public int IndexOf(FilterParameter value)
{
return(this.IndexOf(value));
}
/// <summary>
/// 检查参数列表是否包含指定的参数
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public bool Contains(FilterParameter value)
{
return(-1 != this.IndexOf(value));
}
/// <summary>
/// 向参数列表添加参数
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public FilterParameter Add(FilterParameter value)
{
this.Add((object)value.Clone());
return(value);
}
private void SetParameter(int index, FilterParameter value)
{
//this.OnChange();
this.RangeCheck(index);
this.Replace(index, value);
}