如何在GridView Process ASP.NET中显示gif

I have an application that displays various data in an ASP.NET GridView. The values ​​are displayed as a selection of combobox. When I select comobo box, the reload process is taking about 8 seconds. I would like to display a gif of load before starting the process and end it cancel the display image. I tried to use a thread for this, but it did not work very well. Could someone help me?

我有一个应用程序，在ASP.NET GridView中显示各种数据。值显示为组合框的选择。当我选择comobo box时，重新加载过程大约需要8秒钟。我想在开始进程之前显示一个加载的gif，然后结束它取消显示图像。我尝试使用一个线程，但它没有很好地工作。有人能帮帮我吗？

protected void Page_Load(object sender, EventArgs e)
    {
        //My Image
        imageLoad.Visible = true;
        Assembly myAsm = Assembly.Load("PainelBordo");
        AssemblyName aName = myAsm.GetName();
        Version version = aName.Version;

        BusinessLogicLayer bll = new BusinessLogicLayer();

        LoadDDLWRTG(CreateDataTableWRTGList());
        LoadDataPBList();

        TimerRefresh.Interval = Convert.ToInt32(ConfigurationManager.AppSettings["TimerInterval"].ToString());

        lblUpdateDate.Text = "Refresh " + bll.DateUpdateFormat(DateTime.Now);
        // My image
        imageLoad.Visible = false;
    }

Combobox SelectedIndexChanged.

Combobox SelectedIndexChanged。

protected void ddlWRTGroup_SelectedIndexChanged(object sender, EventArgs e)
    {
        Page_Load(sender, e);
    }

1 个解决方案

#1

Drag and drop a Button(btnInvoke) and Label(lblText) control inside the UpdatePanel. Also add a <div id="divImage"> inside the UpdatePanel. This div will contain a .gif image that depicts progress and is initially set to invisible style="display:none". On the button click, perform a time consuming task. In our case, we have set a delay of 3 seconds by using Thread.Sleep(3000)

在UpdatePanel中拖放Button（btnInvoke）和Label（lblText）控件。还要在UpdatePanel中添加

。此div将包含一个描述进度的.gif图像，并且最初设置为invisible style =“display：none”。在按钮上单击，执行耗时的任务。在我们的例子中，我们使用Thread.Sleep（3000）设置了3秒的延迟

C#

C＃

protected void btnInvoke_Click(object sender, EventArgs e)
    {
        System.Threading.Thread.Sleep(3000);
        lblText.Text = "Processing completed";
    }

Took from here

从这里开始