嗨,我有一个与某些Java脚本绑定的删除按钮,如下所示:

    <script type="text/javascript">
    function confirm_delete()
{
  if (confirm("Are you sure you want to delete this comment?")==true)
    return true;
  else
    return false;
}
</script>
<p>
<asp:Button ID="btn" OnClientClick="if(confirm_delete()){/* post back*/}else{return false;};" OnClick="btnDelete_Click" runat="server" Text="delete"/>


在后面的代码中,我有这个:

      using (OdbcCommand cmd = new OdbcCommand("SELECT idWallPosting, wp.WallPostings, p.PicturePath FROM WallPosting wp LEFT JOIN User u ON u.UserID = wp.UserID LEFT JOIN Pictures p ON p.UserID = u.UserID WHERE wp.UserID=" + userId + " ORDER BY idWallPosting DESC", cn))
            {
                using (OdbcDataReader reader = cmd.ExecuteReader())
                {
                    test1.Controls.Clear();

                    while (reader.Read())
                    {

                        System.Web.UI.HtmlControls.HtmlGenericControl div = new System.Web.UI.HtmlControls.HtmlGenericControl("div");
                        div.Attributes["class"] = "test";


                        div.ID = String.Format("{0}", reader.GetString(0));
                        // the Div ID is set to my idWallPosting in my WallPosting Table
                        Image img = new Image();
                        img.ImageUrl = String.Format("{0}", reader.GetString(2));

                        img.AlternateText = "Test image";

                        div.Controls.Add(img);
                        div.Controls.Add(ParseControl(String.Format("&nbsp&nbsp&nbsp;" + "{0}", reader.GetString(1))));
                        div.Attributes.Add("onclick", "return confirm_delete();");

                        div.Style["clear"] = "both";
                        test1.Controls.Add(div);

                    }
                }
            }
        }
    }


protected void btnDelete_Click(object sender, EventArgs e)
{

    //serverside code if confirm was pressed to delete from WallPosting table based on Div ID.

}


我动态地在后面的代码的第一部分添加了div并向idWallPosting添加了id =,我想我应该这样做,所以在删除它们时,我要做的就是引用div.ID,但不确定如何添加字符串将div id转换为字符串,以便可以将其传递给我的sql语法?

必须从html端而不是服务器端获取,在执行时加载div时其输出如下所示:

(萤火虫)

<div id="ctl00_ContentPlaceHolder1_ContentPlaceHolder2_26"><div>


我将如何剥离ct100 contentplaceholder等,以获取最终编号(26)并将其作为字符串放置在我的删除按钮中?

编辑:(帕特里克)

protected void btnDelete_Click(object sender, EventArgs e)
{
    idWallPosting = Div.ID;

    //serverside code if confirm was pressed.
        using (OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=root; Password=commando;"))
        {
            cn.Open();
            using (OdbcCommand cmd = new OdbcCommand("DELETE FROM WallPosting WHERE idWallPosting = "+idWallPosting+")", cn))
            {
                cmd.ExecuteNonQuery();
            }
        }
        PopulateWallPosts(); //error here

}


编辑:

protected void btnDelete_Click(object sender, EventArgs e)
{

    string id = "ctl00_ContentPlaceHolder1_ContentPlaceHolder2_26";
    string[] idFragments = id.Split('_');
    id = idFragments[idFragments.Length - 1];

    //serverside code if confirm was pressed.
        using (OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=root; Password=commando;"))
        {
            cn.Open();
            using (OdbcCommand cmd = new OdbcCommand("DELETE FROM WallPosting WHERE idWallPosting = " + id + ")", cn))
            {
                cmd.ExecuteNonQuery();
            }
        }
        //PopulateWallPosts();

}


什么也没做。

最佳答案

因此,当单击div时,您要删除还是只单击按钮就删除?

如果只是单击按钮,则可以使用CommandArgument传递您的ID。

如果是div,则再次需要将ID传递给您的Confirm_delete以获取参考。

编辑:1

查看您的代码和注释,除了做ajax postback之外,别无其他方法,因为默认情况下,单击div不会像asp.net按钮那样触发回发。而且您想执行div click的Button_Click事件,这也不正确。

尽管我认为删除整个div并不是一个好主意。如果用户不小心单击div并弹出消息,将非常烦人。

编辑2:

如果有帮助,请参考以下示例:

<div id="testdiv" runat="server">Hello world</div>

//Pass record id to your confirm_delete
int id = 10;
testdiv.Attributes.Add("onclick", "return confirm_delete(" + id.ToString() + ");");

//Updated confirm_delete function

<script type="text/javascript">
        function confirm_delete(id){
            if (confirm('Are you sure you want to delete?')) {
                __doPostBack('DivClicked', id);
            }
            else {
                return false;
            }
        }
</script>


//This goes in your Page_Load code-behind
            if (Page.IsPostBack)
            {
                //It is a postback so check if it was by div click
                string target = Request["__EVENTTARGET"];
                if (target == "DivClicked")
                {
                    string id = Request["__EVENTARGUMENT"];
                    //Call you delete function passing record id
                    Response.Write(id.ToString());
                }
            }

关于c# - sql C#删除div id的语法,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/5489991/

10-12 12:48
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