ASP.NET Web Form服务器控件三级联动

偏执的太偏执、 2022-04-24 05:02 136阅读 0赞

# [ASP.NET Web Form服务器控件三级联动][ASP.NET Web Form] #

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三级联动页面代码

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protected void ddltype1_SelectedIndexChanged(object sender, EventArgs e)
            {
                string ChannelID = ddltype1.SelectedValue;
                if (ChannelID == "")
                {
                    ddltype2.Visible = false;
                    return;
                }
                Binder(Convert.ToInt32(ChannelID), ddltype2);
            }
    
            protected void ddltype2_SelectedIndexChanged(object sender, EventArgs e)
            {
                string ChannelID = ddltype2.SelectedValue;
                if (ChannelID == "")
                {
                    ddltype3.Visible = false;
                    return;
                }
                Binder(Convert.ToInt32(ChannelID), ddltype3);
            }
    
            private void Binder(int ChannelID, DropDownList ddl)
            {
                if (ddl.Items.Count > 0)
                {
                    ddl.Items.Clear();
                }
                ddl.DataTextField = "User_Group_Name";
                ddl.DataValueField = "User_Group_Id";
                List<Community.Model.USER_GROUP> lnc = Community.BLL.BUSER_GROUPExtBLL.GetGROUP(ChannelID);
                if (lnc.Count > 0)
                {
                    ddl.Visible = true;
                    ddl.DataSource = lnc;
                    ddl.DataBind();
                    ddl.Items.Insert(0, new ListItem("---请选择----", ""));
                }
                else
                {
                    ddl.Visible = false;
                }
            }

三级联动后台SelectedIndexChanged事件

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string type1 = ddltype1.SelectedValue;
                string type2 = ddltype2.SelectedValue;
                string type3 = ddltype3.SelectedValue;
    
                if (type1 != "" && type2 != "" && type3 != "")
                {
                    channelid = Convert.ToInt32(type3);
                }
                else if (type1 != "" && type2 != "" && type3 == "")
                {
                    channelid = Convert.ToInt32(type2);
                }
                else if (type1 != "" && type2 == "" && type3 == "")
                {
                    channelid = Convert.ToInt32(type1);
                }
                else
                {
                    channelid = 0;
                }

三级联动后台接受值的代码

posted @ 2017-06-16 13:20 [波霸38][38] 阅读( ...) 评论( ...) [编辑][Link 1] 收藏

[ASP.NET Web Form]: https://www.cnblogs.com/sharing1986687846/p/7027026.html
[ContractedBlock.gif]: https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif
[ExpandedBlockStart.gif]: /images/20220219/1530c30a3f4947e0a0bd17a31a6a6ce4.png
[38]: https://www.cnblogs.com/sharing1986687846/
[Link 1]: https://i.cnblogs.com/EditPosts.aspx?postid=7027026