public OpExpression(OpExpression left,OpExpression right,JoinOP joinOp)
{
this.Left = left;
this.Right = right;
this.joinOp = joinOp;
this.Condition = null;
}
public OpExpression(OpExpression left, OpExpression right, JoinOP joinOp)
{
this.Left = left;
this.Right = right;
this.joinOp = joinOp;
this.Condition = null;
}
private string MakeWhereStr(OpExpression opExpression)
{
if (opExpression == null)
{
return "";
}
StringBuilder sb=new StringBuilder();
switch ((int)opExpression.joinOp)
{
//叶子
case 0:
sb.Append(opExpression.Condition.key)
.Append(GetOpStr((int)opExpression.Condition.op))
.Append(ToSqlString(opExpression.Condition.value));
break;
case 1:
sb.Append(" ( ").Append(MakeWhereStr(opExpression.Left)).Append(" And ").Append(MakeWhereStr(opExpression.Right)).Append(" ) ");
break;
case 2:
sb.Append(" ( ").Append(MakeWhereStr(opExpression.Left)).Append(" Or ").Append(MakeWhereStr(opExpression.Right)).Append(" ) ");
break;
}
return sb.ToString();
}