加载循环延迟c#

本文关键字：延迟 循环 加载 | 更新日期: 2023-09-27 18:03:17

我有一个将数据加载到数据网格的应用程序。然而，加载过程需要几秒钟。我想在数据加载时显示一个加载圆，但是直到数据完成加载后才显示这个圆。代码是:

public void processbutton(object sender, EventArgs e)
        {
     pictureBox1.Visible = true;
     Image image=Image.FromFile("C:''Users''me''Documents''Curr''Projects''Proj''Proj''load.gif");
     pictureBox1.Image = image;
//--------------------------------------------------------------------------
     string ssqlconnectionstring = "string";
     SqlConnection sqlconn = new SqlConnection(ssqlconnectionstring);
     string comm = "SELECT * from Table";
     sqlconn.Open();
//---------------------REST OF CODE-------------------------

加载循环延迟c#

必须在单独的线程中执行所有长时间运行的任务，否则会阻塞UI线程。

查找BackgroundWorker类

欢呼编辑:

或者您可以使用Task类，像这样:

public async void processbutton(object sender, EventArgs e)
{
    pictureBox1.Visible = true;
    Image image=Image.FromFile("C:''Users''me''Documents''Curr''Projects''Proj''Proj''load.gif");
    pictureBox1.Image = image;
    //--------------------------------------------------------------------------
    await Task.Run(() =>
    {
        string ssqlconnectionstring = "string";
        SqlConnection sqlconn = new SqlConnection(ssqlconnectionstring);
        string comm = "SELECT * from Table";
        sqlconn.Open();
        //---------------------REST OF CODE-------------------------            
    });
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