Question

I have a winform that reads in a csv file on a second thread an writes the file data to a console. The main form has a progress bar. I wish to update the progress bar on the main form based on the lines of data read in the second thread. In my second thread function I use:

pBar.BeginInvoke((MethodInvoker)delegate
{
    this.pBar.Value = (int) (((double) nRows) / ((double) fileLines));
});

不用说这似乎并不可行。任何建议都将受到高度赞赏。

As an aside, should I use pBar.Show() and pBar.Hide() or set pBar.Visible in the second thread to show/hide the progress bar?

Thank you.

Answer 1

你可能只是错失了100倍的繁文 the,无法将:

this.pBar.Value = 100*nRows/fileLines;

假设<代码>nRows 数值在<条码>0和<条码>>>之间。然后,你的代码将始终将进度条码定为<0>或1。

我是否应当使用<条码>pBar.Show(和pBar.Hide()或pBar.Visible,在二读中显示/hide the progress bar?

不管你在二读中做什么,你都不应称之为“全球倡议”控制方法。使用<代码>BeginInvoke <>/code>或Invoke至marshal onto the GUI thread.

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