Stream Stream use multiple precautions

Little scum · Posted on 8/2/2019 1:52:30 PM

System.ArgumentOutOfRangeException: 索引超出范围。必须为非负值并小于集合大小。

The exception thrown by the system log is shown in the following figure:

The reason for the exception is that when I save the stream, the system reads the stream beyond the size of the stream.

Use the same stream twice to note 2 points:

1. Stream will save a position: Stream.Position, which represents the position in the current stream, and each read will start from this position, and this position will be set to the last read position after the reading is completedThe first time I read the entire stream, the position reaches the end, and the second time I can't read the content.So you need to set the context before the second read. Request.InputStream.Position=0；

2. The using statement cannot be used for the first read. The using statement actually adds a try, finally block, in which the object's Dispose method will be executed. This way, the second read will not contain any content.

Resolution code:

Before saving the flow, call the following code:

Login is visible.

[Source] Stream Stream use multiple precautions

Related Posts

Sections viewed