InvalidOperationException: UseShellExecute must be false when redirecting I/O.
时间: 2024-02-11 19:04:18 浏览: 24
这条错误信息表明在使用Process类执行外部程序时,使用了重定向输入输出的方式,并且同时将UseShellExecute属性设置为了true。然而,这两个选项是互斥的,不能同时使用。如果想要重定向输入输出,则必须将UseShellExecute属性设置为false。
解决这个错误的方法是,在创建Process对象之后,显式地将UseShellExecute属性设置为false,然后再进行输入输出的重定向操作。例如:
```
Process process = new Process();
process.StartInfo.FileName = "myprogram.exe";
process.StartInfo.UseShellExecute = false;
process.StartInfo.RedirectStandardInput = true;
process.StartInfo.RedirectStandardOutput = true;
process.Start();
```
这样就可以正确地重定向输入输出,避免出现这个错误。
相关问题
InvalidOperationException: Cannot Open when State is Open.
The error message "InvalidOperationException: Cannot Open when State is Open" typically occurs when you try to open a connection to a database that is already open.
To fix this issue, you should first check if the connection is already open before attempting to open it again. You can do this by calling the "State" property of the connection object, which will return the current state of the connection.
For example, you can check if the connection is open like this:
```
if (connection.State == ConnectionState.Open)
{
// Connection is already open, do not attempt to open again
}
else
{
// Connection is not open, open it now
connection.Open();
}
```
Make sure to always close the connection when you are finished using it, to avoid this issue in the future.
System.InvalidOperationException:“The 'components' collection should be ordinal (like an array) with items that have numeric names to indicate the index in the collection. 'components' didn't have a numeric name so couldn't be parsed. Check https://autofac.readthedocs.io/en/latest/configuration/xml.html for configuration examples.” 怎么解决
这个异常通常是因为Autofac配置文件中的"components"节点没有按照顺序排列或者没有数字名称,导致无法解析。为了解决这个问题,您可以按照以下步骤进行操作:
1. 确认您的Autofac配置文件是否正确,特别是"components"节点的格式是否正确。
2. 确认"components"节点中的所有子节点是否按照顺序排列,并且具有数字名称,以表示它们在集合中的索引位置。
3. 如果您仍然无法解决问题,请参考https://autofac.readthedocs.io/en/latest/configuration/xml.html获取配置文件示例,以确保您的配置文件格式正确。
如果上述方法都无法解决问题,请提供更多详细信息,以便我们更好地了解您的问题并提供更准确的解决方案。