编程方式检查数据绑定CheckListBox [英] Programatically Checking DataBound CheckListBox

问题描述

我有一个数据绑定的CheckedListBox，我需要检查它的一些项目。我试着用下面的代码...

I have a DataBound "CheckedListBox", I need to check some items on it. I tried with following code...

if (!string.IsNullOrEmpty(search.Languages))
        {
            string[] langs = search.Languages.Split(',');
            for (int i = 0; i < (langs.Length - 1); i++)
            {
                for (int j = 0; j < clbLang.Items.Count; j++)
                {
                    string lng = clbLang.Items[j] as string;
                    if (lng.Trim() == langs[i])
                    {
                        clbLang.SetItemChecked(j, true);
                        break;
                    }
                }
            }
        }

没有错误，debuged执行正在经历的检查的的过程，但最后我看不到任何东西就可以了检查。

No errors, debuged execution is going through "checking" process, but finally I cannot see anything checked on it.

然后我加入一个按钮并添加以下代码到它。 （后，即可查看所有项目的）

Then I have added a button and added following code to it. (upon click check all the items)

private void button9_Click(object sender, EventArgs e)
    {
        for (int i = 0; i < clbLang.Items.Count; i++)
        {
            clbLang.SetItemChecked(i, true);
        }
    }

有检查的所有的项目，请告诉我，如果任何人都可以在这里看到一个问题...？

It is "checking" all the items, Please tell me if anyone can see a issue here...?

推荐答案

终于找到了，这是一个错误按MS出台。

Finally found out, it is a Bug introduced by MS.

大家都在这里解释。

这个问题是很容易繁殖。只是隐藏和显示数据绑定
的CheckedListBox，你会发现
之前如何检查的项目获得
选中。

The issue is easy to reproduce. Just hide and show a databound CheckedListBox and you will notice how the previously checked items get unchecked.

的CheckedListBox SetItemChecked方法不工作

因此，我们必须找到一个解决办法......我试过follwing方式，它是工作不错...

So we have to find a workaround... I tried follwing way, it is working nice...

目前，我打电话的检查的地方我已经添加以下​​的项目......我加入什么，我需要检查代码控制的的的

At the place where I was calling checking of items I have added following... I am adding what I need to check in Tag of the control.

if (!string.IsNullOrEmpty(search.Languages))
{
    clbLang.Tag = search.Languages;
}

然后，按照该控件的VisibleChanged（）事件代码。

Then, following code in that control's "VisibleChanged()" event.

private void clbLang_VisibleChanged(object sender, EventArgs e)
    {
        string lngs = clbLang.Tag as string;
        if (!string.IsNullOrEmpty(lngs))
        {
            string[] langs = lngs.Split(',');
            foreach (string lang in langs)
            {
                int j = 0;
                foreach (DataRowView row in clbLang.Items)
                {
                    if (row != null)
                    {
                        string lng = row[1] as string;
                        if (lng.Trim() == lang)
                        {
                            clbLang.SetItemChecked(j, true);
                            break;
                        }
                    }
                    j++;
                }
            }
        }
    }

这和我一起工作得很好，希望这将有利于你...

This works well with me, hope it will benefit you...

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