Question

我正在尝试向用户显示一个消息框，他们可以从消息框中选择YES或NO;如果他们选择是我想要调用某个函数，如果他们选择NO，那么我想调用另一个函数。这不是我现在在我的代码中所提供的帮助。谢谢这是我的代码：

 protected void TEST()
    {
        string ID= ddlPr.SelectedValue;
        string PRACTICE_TYPE = DDL_TYPE.SelectedValue;

        using (SqlConnection con = new SqlConnection(strConnString))
        {
            using (SqlCommand cmd = new SqlCommand())
            {
                cmd.Connection = con;
                cmd.CommandType = CommandType.Text;
                cmd.CommandText = "SELECT count(*) from [DA2].[QPMS].[QPMS_RESPONSE] WHERE ID=@ID";
                cmd.Parameters.AddWithValue("@ID", ID);             
                con.Open();
                int result = (int)cmd.ExecuteScalar();
                if (result >=1)

                {
                    //if the user selects YES i want to call some function if user             selects No then i want to call another function.
                    string myscript = "alert ('message');";
                    Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "MyScript", myscript, true);                    

                }
                con.Close();
            }
        }

    }

Answer 1

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
<asp:Button ID="Button3" runat="server" Style="position: static" Text="Button" OnClick="Button1_Click" />
<asp:Button ID="Button2" runat="server" CausesValidation="False" OnClick="Button2_Click" Style="position: static; display: none" Text="Ok" />
<asp:Button ID="Button5" runat="server" CausesValidation="False" OnClick="Button5_Click" Style="position: static; display: none" Text="Cancel" />

script type="text/javascript">
        function confirmProcess()
        {
            if (confirm('are you sure to continue?'))
            {
               //if you are missing this, always use ClientID to get reference to button //control when used with master pages
                document.getElementById('<%=Button2.ClientID%>').click();
            }
            else
            {
                document.getElementById('<%=Button5.ClientID%>').click();
            }


        }
    </script>
</asp:Content>

<强> //代码隐藏

protected void Button5_Click(object sender, EventArgs e)
{
    Response.Write("Clicked Canceled");
}


protected void Button2_Click(object sender, EventArgs e)
{
    Response.Write("Clicked OK");
}


protected void Button1_Click(object sender, EventArgs e)
{
    String csname = "PopupScript";
    Type cstype = this.GetType();
    ClientScriptManager cs = Page.ClientScript;
    if (!cs.IsStartupScriptRegistered(cstype, csname))
    {
        String cstext = "confirmProcess();";
        cs.RegisterStartupScript(cstype, csname, cstext, true);
    }
}

ASP.Net Message Box Alert Display

Answer 2

我目前在我的所有Web应用程序中使用它我创建了一个静态方法，我可以调用其中一个重载方法，这个方法100％我刚测试确认

    public static void ShowClientMessageDlg(string msg, string aValue, string redirect = "")
    {
        string msgFormat;
        msgFormat = string.Format(" {0}", aValue);
        msg = msg + msgFormat;
        HttpContext.Current.Response.Write("<script type='text/javascript'>alert('" + msg + "');</script>");
    }

    /// <summary>
    /// Joins a String of Values to create a Message Box
    /// </summary>
    /// <param name="msg"></param>
    /// <param name="aValue"></param>
    /// <param name="redirect"></param>
    public static void ShowClientMessageDlg(string msg, List<string> aValue, string redirect = "")
    {
        string msgFormat;
        msgFormat = string.Format(" {0}", string.Join<string>(", ", aValue.ToArray()));
        msg = msg + msgFormat;
        HttpContext.Current.Response.Write("<script type='text/javascript'>alert('" + msg + "');</script>");
    }

Answer 3

正如Rahul在评论中所述，消息框仅在winforms中可用。此外，javascript alert只会显示一条消息。您无法根据最终用户响应执行不同的代码块。你想要的是一个确认对话框。这是一个简单的例子here.

来自链接：

<input type=button value="Try it now" 
onClick="if(confirm('Format the hard disk?'))
alert('You are very brave!');
else alert('A wise decision!')">

对于asp，只需创建一个不同的函数来调用而不是警报。

如果您想要替代javascript，您还可以使用AjaxToolkit ConfirmButton Extender。它基于按钮点击，因此您必须＆＃34;作弊＆＃34;一点点使用它。调用MyButton.Click()方法以激活确认对话框。您可以通过设置Display: none;来隐藏按钮。

总的来说，我认为javascript仍然是你最好的选择。

如何在asp.net中使用Message Box

3 个答案: