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Add Queryable.ForEachByPage

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This commit is contained in:
sunkaixuan 2022-03-27 21:40:04 +08:00
parent 4f61d7e03b
commit 69fdb55f06
2 changed files with 39 additions and 1 deletions
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38
Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
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@ -1293,6 +1293,44 @@ namespace SqlSugar
} }
} }
} }
public virtual void ForEachByPage(Action<T> action, int pageIndex, int pageSize, ref int totalNumber, int singleMaxReads = 300, System.Threading.CancellationTokenSource cancellationTokenSource = null)
{
int count = this.Clone().Count();
if (count > 0)
{
if (pageSize > singleMaxReads && count - ((pageIndex - 1) * pageSize) > singleMaxReads)
{
Int32 Skip = (pageIndex - 1) * pageSize;
Int32 NowCount = count - Skip;
Int32 number = 0;
if (NowCount > pageSize) NowCount = pageSize;
while (NowCount > 0)
{
if (cancellationTokenSource?.IsCancellationRequested == true) return;
if (number + singleMaxReads > pageSize) singleMaxReads = NowCount;
foreach (var item in this.Clone().Skip(Skip).Take(singleMaxReads).ToList())
{
if (cancellationTokenSource?.IsCancellationRequested == true) return;
action.Invoke(item);
}
NowCount -= singleMaxReads;
Skip += singleMaxReads;
number += singleMaxReads;
}
}
else
{
if (cancellationTokenSource?.IsCancellationRequested == true) return;
foreach (var item in this.Clone().ToPageList(pageIndex, pageSize))
{
if (cancellationTokenSource?.IsCancellationRequested == true) return;
action.Invoke(item);
}
}
}
totalNumber = count;
}
public List<T> ToOffsetPage(int pageIndex, int pageSize) public List<T> ToOffsetPage(int pageIndex, int pageSize)
{ {
if (this.Context.CurrentConnectionConfig.DbType != DbType.SqlServer) if (this.Context.CurrentConnectionConfig.DbType != DbType.SqlServer)

2
Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
View File

@ -109,7 +109,7 @@ namespace SqlSugar
ISugarQueryable<T> Select(string select); ISugarQueryable<T> Select(string select);
ISugarQueryable<T> MergeTable(); ISugarQueryable<T> MergeTable();
void ForEach(Action<T> action, int singleMaxReads = 300, System.Threading.CancellationTokenSource cancellationTokenSource = null); void ForEach(Action<T> action, int singleMaxReads = 300, System.Threading.CancellationTokenSource cancellationTokenSource = null);
void ForEachByPage(Action<T> action, int pageIndex, int pageSize, ref int totalNumber, int singleMaxReads = 300, System.Threading.CancellationTokenSource cancellationTokenSource = null);
int Count(); int Count();
Task<int> CountAsync(); Task<int> CountAsync();
int Count(Expression<Func<T, bool>> expression); int Count(Expression<Func<T, bool>> expression);