【发布时间】：2011-07-26 06:56:02
【问题描述】：
大家好，我有一个与一些 Javascript 相关联的删除按钮，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"/>
在我后面的代码中：
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("   " + "{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.
}
dynamics 背后的代码的第一部分添加 div 并将 id = 添加到 idWallPosting 我认为我应该这样做，所以当它删除它们时，我所要做的就是引用 div.ID 但我不确定如何添加一个字符串以将 div id 转换为字符串，以便我可以将其传递给我的 sql 语法？
这必须从 html 端获取，而不是从服务器端获取，当 div 在执行时加载时，其输出如下所示：
（萤火虫）
<div id="ctl00_ContentPlaceHolder1_ContentPlaceHolder2_26"><div>
如何去掉 ct100 contentplaceholder 等以获得最后的数字 (26) 并将其作为字符串放在我的删除按钮中？
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();
}
什么都不做。
【问题讨论】：
标签： c# javascript asp.net mysql sql