public static MDataRowCollection FindAll(MDataTable table, object whereObj)
{
if (table != null && table.Rows.Count > 0)
{
MDataRowCollection findRows = new MDataRowCollection();
string where = Convert.ToString(whereObj).Trim();
if (where == "" || where == "1=1")
{
findRows.AddRange(table.Rows);
return(findRows);
}
string whereStr = SqlFormat.GetIFieldSql(whereObj);
string orderby;
SplitWhereOrderby(ref whereStr, out orderby);
List <TFilter> group2 = null;
List <TFilter> filters = GetTFilter(whereStr, table.Columns, out group2);
IList <MDataRow> rows = table.Rows;
if (filters.Count > 0)
{
rows = table.Rows.FindAll(delegate(MDataRow row)
{
return(CompareMore(row, filters) && (group2.Count == 0 || CompareMore(row, group2)));
}
);
}
findRows.AddRange(rows); //添加找到的行。
filters = null;
if (!string.IsNullOrEmpty(orderby) && rows.Count > 1) //进行数组排序
{
findRows.Sort(orderby);
//MDataRowCollection sortRows = new MDataRowCollection();
//sortRows.AddRange(rows);
//sortRows.Sort(orderby);
//return sortRows;
}
return(findRows);
}
return(null);
}
public static MDataRow FindRow(MDataTable table, object whereObj)
{
if (table.Rows.Count > 0)
{
if (Convert.ToString(whereObj).Trim() == "")
{
return(table.Rows[0]);
}
string whereStr = SqlFormat.GetIFieldSql(whereObj);
string orderby;
SplitWhereOrderby(ref whereStr, out orderby);
MDataRowCollection sortRows = null;
if (!string.IsNullOrEmpty(orderby) && table.Rows.Count > 1)//进行数组排序
{
sortRows = new MDataRowCollection();
sortRows.AddRange(table.Rows);
sortRows.Sort(orderby);
}
List <TFilter> group2 = null;
List <TFilter> filters = GetTFilter(whereStr, table.Columns, out group2);
if (filters.Count > 0)
{
if (sortRows == null)
{
sortRows = table.Rows;
}
for (int i = 0; i < sortRows.Count; i++)
{
if (CompareMore(sortRows[i], filters) && (group2.Count == 0 || CompareMore(sortRows[i], group2)))
{
return(sortRows[i]);
}
}
}
}
return(null);
}
/// <summary>
/// 多个条件
/// </summary>
private static List <TFilter> GetTFilter(object whereObj, MDataColumn mdc, out List <TFilter> group2)
{
group2 = new List <TFilter>();
List <TFilter> tFilterList = new List <TFilter>();
string whereStr = SqlFormat.GetIFieldSql(whereObj);
whereStr = SqlCreate.FormatWhere(whereStr, mdc, DataBaseType.None, null);
string lowerWhere = whereStr.ToLower();
string andSign = " and ";
string orSign = " or ";
int andIndex = IndexOf(lowerWhere, andSign, 0);// lowerWhere.IndexOf(andSign);
int orIndex = IndexOf(lowerWhere, orSign, 0);
TFilter filter = null;
if (andIndex == -1 && orIndex == -1)//仅有一个条件
{
filter = GetSingleTFilter(whereStr, mdc);
if (filter != null)
{
tFilterList.Add(filter);
}
}
else if (orIndex == -1) // 只有and条件
{
int andStartIndex = 0;
while (andIndex > -1)
{
filter = GetSingleTFilter(whereStr.Substring(andStartIndex, andIndex - andStartIndex), mdc);
if (filter != null)
{
if (andStartIndex > 0)
{
filter._Ao = Ao.And;
}
tFilterList.Add(filter);
}
andStartIndex = andIndex + andSign.Length;
andIndex = IndexOf(lowerWhere, andSign, andStartIndex + 1);
}
filter = GetSingleTFilter(whereStr.Substring(andStartIndex), mdc);
if (filter != null)
{
filter._Ao = Ao.And;
tFilterList.Add(filter);
}
}
else if (andIndex == -1) //只有or 条件
{
int orStartIndex = 0;
while (orIndex > -1)
{
filter = GetSingleTFilter(whereStr.Substring(orStartIndex, orIndex - orStartIndex), mdc);
if (filter != null)
{
if (orStartIndex > 0)
{
filter._Ao = Ao.Or;
}
tFilterList.Add(filter);
}
orStartIndex = orIndex + orSign.Length;
orIndex = IndexOf(lowerWhere, orSign, orStartIndex + 1);
}
filter = GetSingleTFilter(whereStr.Substring(orStartIndex), mdc);
if (filter != null)
{
filter._Ao = Ao.Or;
tFilterList.Add(filter);
}
}
else //有and 又有 or
{
bool isAnd = andIndex < orIndex;
bool lastAnd = isAnd;
int andOrIndex = isAnd ? andIndex : orIndex;//最小的，前面的先处理
int andOrStartIndex = 0;
bool needGroup2 = isAnd;//如果是and开头，则分成两组
while (andOrIndex > -1)
{
filter = GetSingleTFilter(whereStr.Substring(andOrStartIndex, andOrIndex - andOrStartIndex), mdc);
if (filter != null)
{
if (andOrStartIndex > 0)
{
filter._Ao = lastAnd ? Ao.And : Ao.Or;
}
tFilterList.Add(filter);
}
andOrStartIndex = andOrIndex + (isAnd ? andSign.Length : orSign.Length);
if (isAnd)
{
andIndex = IndexOf(lowerWhere, andSign, andOrStartIndex + 1);
}
else
{
orIndex = IndexOf(lowerWhere, orSign, andOrStartIndex + 1);
}
lastAnd = isAnd;
if (andIndex == -1)
{
isAnd = false;
andOrIndex = orIndex;
}
else if (orIndex == -1)
{
isAnd = true;
andOrIndex = andIndex;
}
else
{
isAnd = andIndex < orIndex;
andOrIndex = isAnd ? andIndex : orIndex;//最小的，前面的先处理
}
}
filter = GetSingleTFilter(whereStr.Substring(andOrStartIndex), mdc);
if (filter != null)
{
filter._Ao = lastAnd ? Ao.And : Ao.Or;
tFilterList.Add(filter);
}
if (tFilterList.Count > 2 && needGroup2)
{
int okflag = -1;
for (int i = 0; i < tFilterList.Count; i++)
{
if (okflag == -1 && tFilterList[i]._Ao == Ao.Or)
{
i--;//返回上一个索引1,2,3
okflag = i;
}
if (okflag != -1)
{
group2.Add(tFilterList[i]);
}
}
tFilterList.RemoveRange(okflag, tFilterList.Count - okflag);
}
}
// string firstFilter=whereStr.su
return(tFilterList);
}
/// <summary>
/// 多个条件
/// </summary>
private static TFilter[] GetTFilter(object whereObj, MDataColumn mdc)
{
List <TFilter> tFilterList = new List <TFilter>();
string whereStr = SqlFormat.GetIFieldSql(whereObj);
whereStr = SqlCreate.FormatWhere(whereStr, mdc, DalType.None, null);
string lowerWhere = whereStr.ToLower();
string andSign = " and ";
string orSign = " or ";
int andIndex = IndexOf(lowerWhere, andSign, 0);// lowerWhere.IndexOf(andSign);
int orIndex = IndexOf(lowerWhere, orSign, 0);
TFilter filter = null;
if (andIndex == -1 && orIndex == -1)//仅有一个条件
{
filter = GetSingleTFilter(whereStr, mdc);
if (filter != null)
{
tFilterList.Add(filter);
}
}
else if (orIndex == -1) // 只有and条件
{
int andStartIndex = 0;
while (andIndex > -1)
{
filter = GetSingleTFilter(whereStr.Substring(andStartIndex, andIndex - andStartIndex), mdc);
if (filter != null)
{
if (andStartIndex > 0)
{
filter._Ao = Ao.And;
}
tFilterList.Add(filter);
}
andStartIndex = andIndex + andSign.Length;
andIndex = IndexOf(lowerWhere, andSign, andStartIndex + 1);
}
filter = GetSingleTFilter(whereStr.Substring(andStartIndex), mdc);
if (filter != null)
{
filter._Ao = Ao.And;
tFilterList.Add(filter);
}
}
else if (andIndex == -1) //只有or 条件
{
int orStartIndex = 0;
while (orIndex > -1)
{
filter = GetSingleTFilter(whereStr.Substring(orStartIndex, orIndex - orStartIndex), mdc);
if (filter != null)
{
if (orStartIndex > 0)
{
filter._Ao = Ao.Or;
}
tFilterList.Add(filter);
}
orStartIndex = orIndex + orSign.Length;
orIndex = IndexOf(lowerWhere, orSign, orStartIndex + 1);
}
filter = GetSingleTFilter(whereStr.Substring(orStartIndex), mdc);
if (filter != null)
{
filter._Ao = Ao.Or;
tFilterList.Add(filter);
}
}
else //有and 又有 or
{
bool isAnd = andIndex < orIndex;
bool lastAnd = isAnd;
int andOrIndex = isAnd ? andIndex : orIndex;//最小的，前面的先处理
int andOrStartIndex = 0;
while (andOrIndex > -1)
{
filter = GetSingleTFilter(whereStr.Substring(andOrStartIndex, andOrIndex - andOrStartIndex), mdc);
if (filter != null)
{
if (andOrStartIndex > 0)
{
filter._Ao = lastAnd ? Ao.And : Ao.Or;
}
tFilterList.Add(filter);
}
andOrStartIndex = andOrIndex + (isAnd ? andSign.Length : orSign.Length);
if (isAnd)
{
andIndex = IndexOf(lowerWhere, andSign, andOrStartIndex + 1);
}
else
{
orIndex = IndexOf(lowerWhere, orSign, andOrStartIndex + 1);
}
lastAnd = isAnd;
if (andIndex == -1)
{
isAnd = false;
andOrIndex = orIndex;
}
else if (orIndex == -1)
{
isAnd = true;
andOrIndex = andIndex;
}
else
{
isAnd = andIndex < orIndex;
andOrIndex = isAnd ? andIndex : orIndex;//最小的，前面的先处理
}
}
filter = GetSingleTFilter(whereStr.Substring(andOrStartIndex), mdc);
if (filter != null)
{
filter._Ao = lastAnd ? Ao.And : Ao.Or;
tFilterList.Add(filter);
}
}
// string firstFilter=whereStr.su
return(tFilterList.ToArray());
}
