ASP.NET C＃如何访问标签内或字符串中的div文本？

Question

I have a div in which user insert SQL query and I want to access this query in codebehind and pass to sqlcmd and execute query and show result to user but I'm unable to do this. How can I do this? Here is my aspx code:

<asp:Content ID="Content2" ContentPlaceHolderID="body" Runat="Server">
    <form id="form1" runat="server">
        <div id="editor" contenteditable="true"></div>
        <br />
        <asp:Button runat="server" OnClick="load" Text="Submit" />
        <asp:label ID="TextBox1" ForeColor="White" runat="server"></asp:label>
    </form>
</asp:Content>

my aspx.cs (codebehind) is :

public void load(object sender, EventArgs e)
{
    HtmlGenericControl footer = (HtmlGenericControl)FindControl("editor");
    String cmd = footer.InnerHtml.ToString();
    TextBox1.Text = cmd;
}

I'm getting this error:

Answer 1

将runat =“ server”添加到您的DIV标签中，它将解决您的问题。

  <div id="editor" contenteditable="true" runat="server"></div>

Answer 2

Add runat="server" in div like this:-

<div id="editor" contenteditable="true" runat="server">Lorem Ipsum</div>

and use this code

protected void Page_Load(object sender, EventArgs e)
    {       
        ContentPlaceHolder mainContent = (ContentPlaceHolder)this.Master.FindControl("body");
        HtmlGenericControl footer = (HtmlGenericControl)mainContent.FindControl("editor");
        String cmd = footer.InnerHtml.ToString();
        TextBox1.Text = cmd;
    }

where body is ContentPlaceHolderID you can find this on your content page

<asp:Content ID="Content2" ContentPlaceHolderID="body" Runat="Server">

Hope this will help you