按下按钮后C＃Combo Box变得不可见

编程入门行业动态更新时间:2024-10-25 07:30:52

本文介绍了按下按钮后C＃Combo Box变得不可见的处理方法，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

public void lists() { foreach (string s in tracker.projectsCollection) { comboBox1.Items.Add(s); } textCase.AutoCompleteCustomSource = tracker.namesCollection; textCase.AutoCompleteSource = AutoCompleteSource.CustomSource; textCase.AutoCompleteMode = AutoCompleteMode.None; // I got error when using this combo box's auto suggestion code comboBox1.AutoCompleteCustomSource = tracker.projectsCollection; comboBox1.AutoCompleteSource = AutoCompleteSource.CustomSource; comboBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend; foreach (string s in tracker.namesCollection) { if (!listBox1.Items.Contains(s)) { listBox1.Items.Add(s); } } } public void get_refresh() { try { Gif_loader_thread(); listBox1.Items.Clear(); textCase.AutoCompleteCustomSource.Clear(); tracker.namesCollection.Clear(); tracker.projectsCollection.Clear(); comboBox1.Items.Clear(); comboBox1.Items.Add("-- Select Project --"); tracker.InitialHits(); lists(); asyncapp(); labelResponse.Text = "Refresh successfully"; comboBox1.SelectedIndex = 0; } catch (Exception ex) { exception_handling(ex); } } public void Gif_loader_thread() { Thread th = new Thread(new ThreadStart(pictureBox1.Show)); th.Start(); timer1.Interval = 3000; timer1.Start(); } private void btnRefresh_Click(object sender, EventArgs e) { Gif_loader_thread(); Thread th = new Thread(get_refresh); th.SetApartmentState(ApartmentState.STA); th.Start(); textCase.Focus(); textCase.SelectAll(); }

以上是我的代码。

我的组合框中有自动建议属性。我收到错误"当前线程当前线程必须设置为单线程公寓STA模式才能进行调用。"但是当我使用这个代码时;我摆脱了这个错误。但是，当我按下刷新按钮时，现在我的组合将不可见。

I have auto suggestion property in my combo box. I was getting error "Current thread current thread must be set to single thread apartment STA mode before ole calls can be made.." but when I use this code; I get rid of this error.But, now my combo will invisible when I pressed the refresh button.

th.SetApartmentState(ApartmentState.STA);

如何取回我的组合框？这是我的问题？

How can i get back my combo box? that is my question?

推荐答案

两个线程，一个计时器..

Two Threads, One Timer..

线程一是用于显示进度图像...

Thread One is used to show a Progress image...

线程2用于填充控件。

按钮事件正在调用 Gif_loader_thread（）显示进度图像&然后调用 get_refresh（）来填充控件，但

Button Event is calling Gif_loader_thread() to show Progress image & then calls get_refresh() to populate controls but

再次调用 Gif_loader_thread（）&从而使s creen无反应......