尝试/抓住没有抓住 [英] Try/Catch does not catch

问题描述

在下面的代码中，我有意地将@fooData错误地写入@ foo111Data，以检查try语句是否捕获我的异常。见下面的代码。但是try / catch语句没有在MessageBox中捕获并显示和异常，VS2010只是分解并突出显示错误代码行。

In following code I purposefully mistype "@fooData" to "@foo111Data" to check if the try statement is catching my exception. See below code. But the try/catch statement did not catch and display and exception in MessageBox, and VS2010 just break down and highlight the line of wrong code.

try
{
    conn.Open();
    cmd.Parameters.AddWithValue("@foo111Data", dataStrTb1.Text);
    cmd.ExecuteNonQuery();
}
catch (SqlCeException ex)
{
    MessageBox.Show(ex.ToString());
}
finally
{
    conn.Close();
}

推荐答案

正在抛出一个不同类型的问题？我建议您更改 catch ，以便它仅捕获一般的异常，看看它是否是另一种类型。

Perhaps an exception of a different type is being thrown? I would suggest that you change the catch so that it just catches a general Exception, and see if it's throwing another type.

在 catch 语句中放置一个断点 MessageBox.Show 行，然后您可以检查异常。

Put a breakpoint in the catch statement, on the MessageBox.Show line, and then you can examine the Exception.

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