本文整理汇总了C#中QueryFromClause.Remove方法的典型用法代码示例。如果您正苦于以下问题：C# QueryFromClause.Remove方法的具体用法？C# QueryFromClause.Remove怎么用？C# QueryFromClause.Remove使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类QueryFromClause的用法示例。
在下文中一共展示了QueryFromClause.Remove方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: TryRemoveTransparentIdentifier
bool TryRemoveTransparentIdentifier(QueryExpression query, QueryFromClause fromClause, QueryExpression innerQuery, string continuationIdentifier, out string transparentIdentifier)
{
transparentIdentifier = fromClause.Identifier;
Match match = selectTransparentIdentifierPattern.Match(innerQuery.Clauses.Last());
if (!match.Success)
return false;
QuerySelectClause selectClause = (QuerySelectClause)innerQuery.Clauses.Last();
Expression nae1 = match.Get<Expression>("nae1").SingleOrDefault();
string nae1Name = ExtractExpressionName(ref nae1);
if (nae1Name == null)
return false;
Expression nae2 = match.Get<Expression>("nae2").SingleOrDefault();
string nae2Name = ExtractExpressionName(ref nae2);
if (nae2Name == null)
return false;
bool introduceLetClause = true;
var nae1Identifier = nae1 as IdentifierExpression;
var nae2Identifier = nae2 as IdentifierExpression;
if (nae1Identifier != null && nae2Identifier != null && nae1Identifier.Identifier == nae1Name && nae2Identifier.Identifier == nae2Name) {
introduceLetClause = false;
}
if (nae1Name != continuationIdentifier) {
if (nae2Name == continuationIdentifier) {
//Members are in reversed order
string tempName = nae1Name;
Expression tempNae = nae1;
nae1Name = nae2Name;
nae1 = nae2;
nae2Name = tempName;
nae2 = tempNae;
} else {
return false;
}
}
if (introduceLetClause && innerQuery.Clauses.OfType<QueryFromClause>().Any(from => from.Identifier == nae2Name)) {
return false;
}
if (introduceLetClause && innerQuery.Clauses.OfType<QueryJoinClause>().Any(join => join.JoinIdentifier == nae2Name)) {
return false;
}
// from * in (from x in ... select new { x = x, y = expr }) ...
// =>
// from x in ... let y = expr ...
fromClause.Remove();
selectClause.Remove();
// Move clauses from innerQuery to query
QueryClause insertionPos = null;
foreach (var clause in innerQuery.Clauses) {
query.Clauses.InsertAfter(insertionPos, insertionPos = clause.Detach());
}
if (introduceLetClause) {
query.Clauses.InsertAfter(insertionPos, new QueryLetClause { Identifier = nae2Name, Expression = nae2.Detach() });
}
return true;
}示例2: TryRemoveTransparentIdentifier
bool TryRemoveTransparentIdentifier(QueryExpression query, QueryFromClause fromClause, QueryExpression innerQuery, out string transparentIdentifier)
{
transparentIdentifier = fromClause.Identifier;
Match match = selectTransparentIdentifierPattern.Match(innerQuery.Clauses.Last());
if (!match.Success)
return false;
QuerySelectClause selectClause = (QuerySelectClause)innerQuery.Clauses.Last();
Expression nae1 = match.Get<Expression>("nae1").SingleOrDefault();
string nae1Name = ExtractExpressionName(ref nae1);
if (nae1Name == null)
return false;
Expression nae2 = match.Get<Expression>("nae2").SingleOrDefault();
string nae2Name = ExtractExpressionName(ref nae2);
if (nae1Name == null)
return false;
// from * in (from x in ... select new { x = x, y = expr }) ...
// =>
// from x in ... let y = expr ...
fromClause.Remove();
selectClause.Remove();
// Move clauses from innerQuery to query
QueryClause insertionPos = null;
foreach (var clause in innerQuery.Clauses) {
query.Clauses.InsertAfter(insertionPos, insertionPos = clause.Detach());
}
query.Clauses.InsertAfter(insertionPos, new QueryLetClause { Identifier = nae2Name, Expression = nae2.Detach() });
return true;
}示例3: TryRemoveTransparentIdentifier
bool TryRemoveTransparentIdentifier(QueryExpression query, QueryFromClause fromClause, QueryExpression innerQuery)
{
if (!IsTransparentIdentifier(fromClause.Identifier))
return false;
Match match = selectTransparentIdentifierPattern.Match(innerQuery.Clauses.Last());
if (!match.Success)
return false;
QuerySelectClause selectClause = (QuerySelectClause)innerQuery.Clauses.Last();
NamedExpression nae1 = match.Get<NamedExpression>("nae1").SingleOrDefault();
NamedExpression nae2 = match.Get<NamedExpression>("nae2").SingleOrDefault();
if (nae1 != null && nae1.Name != ((IdentifierExpression)nae1.Expression).Identifier)
return false;
Expression nae2Expr = match.Get<Expression>("nae2Expr").Single();
IdentifierExpression nae2IdentExpr = nae2Expr as IdentifierExpression;
if (nae2IdentExpr != null && (nae2 == null || nae2.Name == nae2IdentExpr.Identifier)) {
// from * in (from x in ... select new { x = x, y = y }) ...
// =>
// from x in ... ...
fromClause.Remove();
selectClause.Remove();
// Move clauses from innerQuery to query
QueryClause insertionPos = null;
foreach (var clause in innerQuery.Clauses) {
query.Clauses.InsertAfter(insertionPos, insertionPos = clause.Detach());
}
} else {
// from * in (from x in ... select new { x = x, y = expr }) ...
// =>
// from x in ... let y = expr ...
fromClause.Remove();
selectClause.Remove();
// Move clauses from innerQuery to query
QueryClause insertionPos = null;
foreach (var clause in innerQuery.Clauses) {
query.Clauses.InsertAfter(insertionPos, insertionPos = clause.Detach());
}
string ident;
if (nae2 != null)
ident = nae2.Name;
else if (nae2Expr is IdentifierExpression)
ident = ((IdentifierExpression)nae2Expr).Identifier;
else if (nae2Expr is MemberReferenceExpression)
ident = ((MemberReferenceExpression)nae2Expr).MemberName;
else
throw new InvalidOperationException("Could not infer name from initializer in AnonymousTypeCreateExpression");
query.Clauses.InsertAfter(insertionPos, new QueryLetClause { Identifier = ident, Expression = nae2Expr.Detach() });
}
return true;
}示例4: TryRemoveTransparentIdentifier
bool TryRemoveTransparentIdentifier(QueryExpression query, QueryFromClause fromClause, QueryExpression innerQuery)
{
if (!IsTransparentIdentifier(fromClause.Identifier))
return false;
Match match = selectTransparentIdentifierPattern.Match(innerQuery.Clauses.Last());
if (!match.Success)
return false;
QuerySelectClause selectClause = (QuerySelectClause)innerQuery.Clauses.Last();
NamedArgumentExpression nae1 = match.Get<NamedArgumentExpression>("nae1").Single();
NamedArgumentExpression nae2 = match.Get<NamedArgumentExpression>("nae2").Single();
if (nae1.Identifier != ((IdentifierExpression)nae1.Expression).Identifier)
return false;
IdentifierExpression nae2IdentExpr = nae2.Expression as IdentifierExpression;
if (nae2IdentExpr != null && nae2.Identifier == nae2IdentExpr.Identifier) {
// from * in (from x in ... select new { x = x, y = y }) ...
// =>
// from x in ... ...
fromClause.Remove();
selectClause.Remove();
// Move clauses from innerQuery to query
QueryClause insertionPos = null;
foreach (var clause in innerQuery.Clauses) {
query.Clauses.InsertAfter(insertionPos, insertionPos = clause.Detach());
}
} else {
// from * in (from x in ... select new { x = x, y = expr }) ...
// =>
// from x in ... let y = expr ...
fromClause.Remove();
selectClause.Remove();
// Move clauses from innerQuery to query
QueryClause insertionPos = null;
foreach (var clause in innerQuery.Clauses) {
query.Clauses.InsertAfter(insertionPos, insertionPos = clause.Detach());
}
query.Clauses.InsertAfter(insertionPos, new QueryLetClause { Identifier = nae2.Identifier, Expression = nae2.Expression.Detach() });
}
return true;
}