本文介绍了数据源连接未重置的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我创建了一个包含以下组件(button1,button2和列表框)的简单项目.

按钮1的代码

I created a simple project with following components (button1, button2 and listbox).

The code for button 1

listBox1.Items.Clear();

            RegistryKey OurKey = Registry.LocalMachine;
            OurKey = OurKey.OpenSubKey(@"SOFTWARE\\MyRegistry\\", true);

            if (OurKey != null)
            {
                  foreach (string sub in OurKey.GetSubKeyNames())
                {
                    listBox1.Items.Add(sub);
                }
                OurKey = OurKey.OpenSubKey(@"SOFTWARE\\MyRegistry\\", false);
            }
            else
            {
                listBox1.Items.Add("Key does not exist");
            }


按钮2的代码



The code for button 2


listBox1.Items.Clear();
openFileDialog1.InitialDirectory = @"C:\MyFile\MyFiles";
            openFileDialog1.Filter = "text|*.txt|All|*.*";
            openFileDialog1.FilterIndex = 1;
            openFileDialog1.Multiselect = true;

            if (openFileDialog1.ShowDialog() != DialogResult.Cancel)
            {
               string[] lines = File.ReadAllLines(openFileDialog1.FileName);

                listBox1.DataSource = lines;


            }
                     //listBox1.DataBindings.Clear();
                    // listbox1.DataSource=null




当我单击按钮1时,将正确填充列表框,然后单击按钮2,列表也将正确填充;当单击按钮2时,列表也将正确填充.但是,如果再次单击按钮1,则会出现错误设置DataSource属性时无法修改项目集合".
我尝试使用"listbox1.DataSource = null"或"listBox1.DataBindings.Clear()",但没有运气




When I click button one, the listbox is populated correctly, then I click button 2, the list is populated correctly as well; however, if I click button 1 again I get an error "Item collection cannot be modified when the DataSource property is set".
I tried to use "listbox1.DataSource=null" or "listBox1.DataBindings.Clear()" but no luck
Any help will be greatly appreciated

推荐答案

List<string> myList = new List<string>();
myList.Add("Item 1");
myList.Add("Item 2");
myList.Add("Item 3");

listBox1.DataSource = myList;</string></string>


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07-17 10:20
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