如何使用C＃检查Ajax选项卡是否为空 [英] How to Check If An Ajax Tab Is Empty Using C#

问题描述

大家好，



我想检查ajax选项卡是否为空，如果ajax选项卡内没有任何内容，我想显示找不到内容 标签信息。我的ajax标签以这种方式在C＃中动态填充：

hi all,

I want to check whether the ajax tab is empty, if there is nothing inside the ajax tab, I want to display "no content found" label message. My ajax tab is being populated dynamically in C# in this way:

public void BindChart()
        {
            //Create new TabContainer
            AjaxControlToolkit.TabContainer container = new AjaxControlToolkit.TabContainer();
            container.ID = "TabContainer";
            container.EnableViewState = false;
            container.Tabs.Clear();

                    AjaxControlToolkit.TabPanel panel = new AjaxControlToolkit.TabPanel();
                    panel.HeaderText += item.Text;
                    container.Tabs.Add(panel);

问题：如何检查ajax标签是否为空/没有内容然后添加到那个空标签中的标签？



我已经解决了但是有人知道在C＃中用Arial标记字体样式？

这是我的更新代码：

Question: How to check if any ajax tab is empty/has no content then add in a label in that empty tab?

I have solved it but anyone knows label font style to Arial in C#?
This is my updated code:

if(panel.Controls.Count<1)
                   {
                       System.Web.UI.HtmlControls.HtmlGenericControl panelDIV = new System.Web.UI.HtmlControls.HtmlGenericControl("DIV");
                       panelDIV.ID = "panelDIV";
                       panelDIV.Style.Add(HtmlTextWriterStyle.TextAlign, "center");
                       panelDIV.Style.Add(HtmlTextWriterStyle.Width, "100%");

                       System.Web.UI.WebControls.Label newTabel = new System.Web.UI.WebControls.Label();
                       newTabel.Text += "<br />" + "<br />" + "<br />" + "<br />" + "no content to display";
                       newTabel.Font.Bold = true;
                       newTabel.Font.Size=16;
                       panelDIV.Controls.Add(newTabel);
                       panel.Controls.Add(panelDIV);
                   }

谢谢。

Thanks.

推荐答案

您可以使用多个过程，例如

You can use several process like

 if (panel.Controls.Count > 0)
{
   // Add A lable
}

或

or

if (panel.HasControls())
{
    // Add A lable
}

或

or

StringBuilder content = new StringBuilder();
StringWriter sWriter = new StringWriter(content);
HtmlTextWriter htmlWriter = new HtmlTextWriter(sWriter);
pnlMyPanel.RenderControl(htmlWriter);

if (htmlWriter.ToString() != "")
{
    // Add A lable
}

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