public static bool CheckOpList(List <OpItem> opList)
{
if (opList.Count < 2)
{
return(false);
}
if (opList[0].OpState != OpState.开始)
{
return(false);
}
for (int i = 1; i < opList.Count; i++)
{
OpItem lastOpItem = opList[i - 1];
OpItem curOpItem = opList[i];
switch (lastOpItem.OpState)
{
case OpState.开始:
if (curOpItem.OpState != OpState.左括号 && curOpItem.OpState != OpState.条件)
{
return(false);
}
break;
case OpState.左括号:
if (curOpItem.OpState != OpState.左括号 && curOpItem.OpState != OpState.条件)
{
return(false);
}
break;
case OpState.逻辑关系:
if (curOpItem.OpState != OpState.左括号 && curOpItem.OpState != OpState.条件)
{
return(false);
}
break;
case OpState.条件:
if (curOpItem.OpState != OpState.右括号 && curOpItem.OpState != OpState.逻辑关系 && curOpItem.OpState != OpState.结束)
{
return(false);
}
break;
case OpState.右括号:
if (curOpItem.OpState != OpState.右括号 && curOpItem.OpState != OpState.逻辑关系 && curOpItem.OpState != OpState.结束)
{
return(false);
}
break;
case OpState.结束:
return(true);
break;
}
if (curOpItem.OpState == OpState.结束)
{
return(true);
}
}
return(false);
}
private void button1_Click(object sender, EventArgs e)
{
List <OpItem> opList = new List <OpItem>();
OpItem ksOpt = new OpItem(OpState.开始);
opList.Add(ksOpt);
for (int row = 1; row < this.gridView1.DataRowCount; row++)
{
string lgStr = getCellString(row, 0);
if (row > 1 && lgStr != "")
{
OpItem lgOpt = new OpItem(OpState.逻辑关系, (object)Enum.Parse(typeof(LogicOpType), lgStr));
opList.Add(lgOpt);
}
string zkhStr = getCellString(row, 1);
if (zkhStr != "")
{
for (int i = 0; i < zkhStr.Length; i++)
{
OpItem lgOpt = new OpItem(OpState.左括号);
opList.Add(lgOpt);
}
}
string fieldStr = getCellString(row, 2);
string relationStr = getCellString(row, 3);
object fieldVal = getCellVal(row, 4);
if (fieldStr != "" && relationStr != "")
{
EntityField field = queryEntity.GetByDisplay(fieldStr);
if (field != null)
{
SealedCondition condition = field.Create(relationStr, fieldVal);
if (condition != null)
{
OpItem cdOpt = new OpItem(OpState.条件, condition);
opList.Add(cdOpt);
}
}
}
string ykhStr = getCellString(row, 5);
if (ykhStr != "")
{
for (int i = 0; i < ykhStr.Length; i++)
{
OpItem lgOpt = new OpItem(OpState.右括号);
opList.Add(lgOpt);
}
}
}
OpItem esOpt = new OpItem(OpState.结束);
opList.Add(esOpt);
if (ConditionManager.CheckOpList(opList))
{
Condition rCd = ConditionManager.ConvertOpList(opList);
if (rCd != null)
{
this.WhereSql = rCd.ToSql();;
DialogResult = DialogResult.OK;
this.Close();
}
else
{
MessageBox.Show("查询条件不正确");
}
}
else
{
MessageBox.Show("查询条件不正确");
}
}
public static Condition ConvertOpList(List <OpItem> opList)
{
Condition result = null;
Stack <OpItem> opStack = new Stack <OpItem>();
foreach (var item in opList)
{
OpItem lastOpItem = item;
switch (lastOpItem.OpState)
{
case OpState.开始:
opStack.Clear();
break;
case OpState.左括号:
opStack.Push(lastOpItem);
break;
case OpState.逻辑关系:
opStack.Push(lastOpItem);
break;
case OpState.条件:
while (opStack.Count > 0 && opStack.Peek().OpState == OpState.逻辑关系)
{
OpItem logicItem = opStack.Pop();
OpItem d1 = opStack.Pop();
if (d1.OpState != OpState.条件)
{
throw new Exception("查询条件不正确");
}
ComposeCondition c = new ComposeCondition((Condition)d1.OpValue, (LogicOpType)logicItem.OpValue, (Condition)lastOpItem.OpValue);
OpItem np = new OpItem(OpState.条件, c);
lastOpItem = np;
}
opStack.Push(lastOpItem);
break;
case OpState.右括号:
OpItem cond1 = opStack.Pop();
OpItem zkh = opStack.Pop();
if (cond1.OpState != OpState.条件 || zkh.OpState != OpState.左括号)
{
throw new Exception("查询条件不正确");
}
lastOpItem = cond1;
while (opStack.Count > 0 && opStack.Peek().OpState == OpState.逻辑关系)
{
OpItem logicItem = opStack.Pop();
OpItem d1 = opStack.Pop();
if (d1.OpState != OpState.条件)
{
throw new Exception("查询条件不正确");
}
ComposeCondition c = new ComposeCondition((Condition)d1.OpValue, (LogicOpType)logicItem.OpValue, (Condition)lastOpItem.OpValue);
OpItem np = new OpItem(OpState.条件, c);
lastOpItem = np;
}
opStack.Push(lastOpItem);
break;
case OpState.结束:
if (opStack.Count == 1)
{
OpItem resultItem = opStack.Pop();
if (resultItem.OpState == OpState.条件)
{
result = (Condition)resultItem.OpValue;
}
}
break;
}
}
return(result);
}
