问题描述

我有一个查看数据库的自动完成文本框.有时我在打字时收到以下错误.

I have an autocompleate textbox that looks into a data base. Some times while I'm typing I received the following error.

试图读取或写入受保护的内存.这通常表明其他内存已损坏.

这里是代码

private void tBSearchName_TextChanged(object sender, EventArgs e)
            {
                try
                {
                    //test length
                    if (tBSearchName.Text.Length > 3)
                    {
                        //prevent db lookups
                        if (!tBSearchName.Text.ToLower().Contains(oldName) || oldName == String.Empty)
                        {
                            //test for a name + first letter of last name
                            if (Regex.IsMatch(tBSearchName.Text, @"(w)+s(w)+(.)*"))
                            {
                                tBSearchName.AutoCompleteCustomSource = AccessDB.serachByNemberName(tBSearchName.Text);
                                tBSearchName.AutoCompleteMode = AutoCompleteMode.Suggest;
                                //prevent db lookups
                                oldName = tBSearchName.Text.ToLower();
                            }
                        }
                    }
                }
                catch
                {
                }
            } 

我的见解是，我应该在搜索完成时快速输入应用程序，有人可以建议如何做到这一点.或对正在发生的事情的任何其他见解

My insight is that I should frezz typing into the application while search is done, can some suggest how to do this. Or any other insight on what is happening

推荐答案

这是 Windows Forms 的一个 bug自动完成 API 的包装器.Windows 窗体不保护 AutoCompleteCustomSource 对象在被自动完成创建的后台线程枚举时被替换.

It is a bug in Windows Forms's wrapper of autocomplete APIs. Windows Forms does not protect the AutoCompleteCustomSource object from being replaced while it is being enumerated by a background thread created by autocomplete.

您可以尝试替换自动补全对象或使用 IAutoCompleteDropDown 接口重置枚举器.

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