C#列表框和标签预览 [英] C# listbox and label preview

问题描述

我正在尝试使标签始终显示列表框中的项目数，为此，我得到的全部是删除"按钮，该按钮删除所选项目，并添加一个项目.

I''m trying so that a label always shows the number of items in the listbox, all i got for this is remove button that removes the selected item and one that adds an item. how do i put these all together so that the label always shows the listbox''s item count?

推荐答案

private void btn_Add_Click(object sender, EventArgs e)
        {
        //Adding /////
     Label1.text = Convert.tostring(ListBox1.Items.Count);

     }


private void btn_Remove_Click(object sender, EventArgs e)
        {
        //Removing /////
     Label1.text = Convert.tostring(ListBox1.Items.Count);

     }

在添加按钮"事件中

Label1.text =";
添加/删除后

Label1.text = Convert.tostring(ListBox1.Items.Count);

On the Add Button event

Label1.text=" ";
after Adding / Removing

Label1.text = Convert.tostring(ListBox1.Items.Count);

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