工具栏收藏夹，导航和存储问题 [英] Favorites to ToolBar, Navigation and Store Problem

问题描述

我正在尝试制作一个包含收藏夹按钮的工具栏.这些按钮保存浏览器.和browser.DocumentTitle.ToString();

我有以下代码:

I''m trying to make a toolbar that holds favorite buttons. The buttons hold the browser.Url.ToString(); and the browser.DocumentTitle.ToString();

I have this code:

private void button1_Click_1(object sender, RoutedEventArgs e)
        {
            System.Windows.Forms.WebBrowser browser = GetCurrentWebBrowser();
            //ButtonBar.Items.Add(newItem: browser.DocumentTitle.ToString());
            groupBox1.Visibility = Visibility.Hidden;
            var tb = new System.Windows.Controls.ToolBar();

            tb = ButtonBar;

            var b = new System.Windows.Controls.Button();
            var l = new System.Windows.Forms.Label();

            l.Text = browser.Url.ToString();

            b.CommandParameter = browser.Url.ToString();
            b.Content = textBox2.Text;
            tb.Items.Add(b);
            b.Click += new RoutedEventHandler(b_Click);
            b.Tag = browser.Url.ToString();

        }

        void b_Click(object sender, RoutedEventArgs e)
        {
                var l = new System.Windows.Forms.Label();
                var b = new System.Windows.Controls.Button();

                ButtonBar.Items.ToString();
                System.Windows.Forms.WebBrowser browser = GetCurrentWebBrowser();

ERROR HERE >>>>>>>>>>> browser.Navigate(b.Tag.ToString());
            
      }

您可以看到我有一些尝试使按钮无法容纳浏览器的网址..

任何建议如何使我创建的按钮都同时包含browser.Url和TextBox作为内容?

如果我不太清楚，请告诉我；)

当我运行此代码时，我得到对象引用未设置为对象的实例".问题出在b.Tag.ToString();

You can see that i have some failed attempts to make the Buttons to hold the browser''s Url..

Any suggestion how to make the buttons i create to hold both the browser.Url from the textBox and the browser.DocumentText as Content?

If im not clear enough just tell me ;)

When i run this code i get "Object reference not set to an instance of an object." the problem is at the Navigation point with the b.Tag.ToString();

推荐答案

的导航点上，您的代码中有几个问题，但您报告的错误是由创建新按钮然后尝试使用它的Tag属性为空的事实. (新按钮未为其标签分配任何内容).

There are several problems in your code but the error you are reporting is caused by the fact that you create a new button and then try to use it''s Tag property which is null. (a new button doesn''t have anything assigned to it''s tag).

void b_Click(object sender, RoutedEventArgs e)
{
        var l = new System.Windows.Forms.Label();
        var b = new System.Windows.Controls.Button(); // <====== b = a new button here (empty Tag)
        ButtonBar.Items.ToString();
        System.Windows.Forms.WebBrowser browser = GetCurrentWebBrowser();
        browser.Navigate(b.Tag.ToString()); // <======= Try to use Tag here and it's null
}

您可能想要类似
的东西

you probably want something like

Button b = sender as System.Windows.Controls.Button;
if (b != null)
{
    // rest of your code here
}

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