动态添加下更多拉框 添加下拉框的内容从数据库读取内容 第一个下拉框选择内容如果数据库中还有它的子类的话就添加多一个下拉框 显示它的子类选项如果选择生成的下拉框选择的内容又有子类的话有动态添加一个下拉框 显示它的子类选择一直... ... 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 private void createdrop() { int i = 0; int k = 0; DataSet ds = (DataSet)ViewState["DS"]; if(ViewState["PlaceHoldernum"] != null) { i = Convert.ToInt32(ViewState["PlaceHoldernum"].ToString()); for(; k < i; k++) { DropDownList tmp = new DropDownList(); tmp.ID = "drop" + k.ToString(); switch(k % 5) { case 0: utility.Method.BindList(tmp,ds.Tables[8],"");//身份类别 break; case 1: utility.Method.BindList(tmp,ds.Tables[2],"");//学制 break; case 2: utility.Method.BindList(tmp,ds.Tables[3]);//科别 break; case 3: utility.Method.BindList(tmp,ds.Tables[4]);//年级 break; case 4: utility.Method.BindList(tmp,ds.Tables[5]);//班别 break; default: break; } PlaceHolder2.Controls.Add(tmp); if((k+1) % 5 == 0) PlaceHolder2.Controls.Add(new HtmlGenericControl("br")); } } } private void Button3_Click(object sender, System.EventArgs e) { int k = Convert.ToInt32(ViewState["PlaceHoldernum"]); DataSet ds = (DataSet)ViewState["DS"]; DropDownList drop1 = new DropDownList(); drop1.ID = "drop" + k.ToString(); utility.Method.BindList(drop1,ds.Tables[8],"");//身份类别 PlaceHolder2.Controls.Add(drop1); k++; DropDownList drop2 = new DropDownList(); drop2.ID = "drop" + k.ToString(); utility.Method.BindList(drop2,ds.Tables[2],"");//学制 PlaceHolder2.Controls.Add(drop2); k++; DropDownList drop3 = new DropDownList(); drop3.ID = "drop" + k.ToString(); utility.Method.BindList(drop3,ds.Tables[3]);//科别 PlaceHolder2.Controls.Add(drop3); k++; DropDownList drop4 = new DropDownList(); drop4.ID = "drop" + k.ToString(); utility.Method.BindList(drop4,ds.Tables[4]);//年级 PlaceHolder2.Controls.Add(drop4); k++; DropDownList drop5 = new DropDownList(); drop5.ID = "drop" + k.ToString(); utility.Method.BindList(drop5,ds.Tables[5]);//班别 PlaceHolder2.Controls.Add(drop5); k++; PlaceHolder2.Controls.Add(new HtmlGenericControl("br")); ViewState["PlaceHoldernum"] = k; } 建议用Ajax 可满足动态添加! 可能是我的表达有不明确如:http://search1.taobao.com/browse/ad_search.htm 的 类别只是可能下拉框更多 webform:dropdownlist1.datasource=datatable;dropdownlist1.text="name";dropdownlist1.value="id";dropdownlist1.dataBind();<select id="sl"><%for(int i=0;i<dt.rows.cout;++i)%><option value="<%=dt.rows[i]["id"].ToString()%>"><%=dt.rows[i]["name"].ToString()%></option></select>............winform:combox1.datasource=dt;combox1.displaymember="name";combox1.valuemember="id";..... js图片定时上移 contextMenuStrip弹出位置问题 请问ASP.NET如何制作网站多风格选择? asp.net 访问本地机目录失败:Access to the path ...... is denied. 求教把一个ArrayList 传到别一页面的方法 关于层的显示,如何控制,用哪个属性? 用程序代码动态添加DATAGRID的自定义数据绑定列(TemplateColumn) 请教怎样做“视频播放功能” Cookie传递 怎么删除指定文件和指定文件夹下所有文件 水晶报表推模式的问题,总是提示要登录? Access2003 无查询结果
private void createdrop()
{
int i = 0;
int k = 0;
DataSet ds = (DataSet)ViewState["DS"];
if(ViewState["PlaceHoldernum"] != null)
{
i = Convert.ToInt32(ViewState["PlaceHoldernum"].ToString());
for(; k < i; k++)
{
DropDownList tmp = new DropDownList();
tmp.ID = "drop" + k.ToString();
switch(k % 5)
{
case 0:
utility.Method.BindList(tmp,ds.Tables[8],"");//身份类别
break;
case 1:
utility.Method.BindList(tmp,ds.Tables[2],"");//学制
break;
case 2:
utility.Method.BindList(tmp,ds.Tables[3]);//科别
break;
case 3:
utility.Method.BindList(tmp,ds.Tables[4]);//年级
break;
case 4:
utility.Method.BindList(tmp,ds.Tables[5]);//班别
break;
default:
break;
}
PlaceHolder2.Controls.Add(tmp);
if((k+1) % 5 == 0)
PlaceHolder2.Controls.Add(new HtmlGenericControl("br"));
}
}
}
{
int k = Convert.ToInt32(ViewState["PlaceHoldernum"]);
DataSet ds = (DataSet)ViewState["DS"];
DropDownList drop1 = new DropDownList();
drop1.ID = "drop" + k.ToString();
utility.Method.BindList(drop1,ds.Tables[8],"");//身份类别
PlaceHolder2.Controls.Add(drop1);
k++;
DropDownList drop2 = new DropDownList();
drop2.ID = "drop" + k.ToString();
utility.Method.BindList(drop2,ds.Tables[2],"");//学制
PlaceHolder2.Controls.Add(drop2);
k++;
DropDownList drop3 = new DropDownList();
drop3.ID = "drop" + k.ToString();
utility.Method.BindList(drop3,ds.Tables[3]);//科别
PlaceHolder2.Controls.Add(drop3);
k++;
DropDownList drop4 = new DropDownList();
drop4.ID = "drop" + k.ToString();
utility.Method.BindList(drop4,ds.Tables[4]);//年级
PlaceHolder2.Controls.Add(drop4);
k++;
DropDownList drop5 = new DropDownList();
drop5.ID = "drop" + k.ToString();
utility.Method.BindList(drop5,ds.Tables[5]);//班别
PlaceHolder2.Controls.Add(drop5);
k++;
PlaceHolder2.Controls.Add(new HtmlGenericControl("br"));
ViewState["PlaceHoldernum"] = k;
}
dropdownlist1.datasource=datatable;
dropdownlist1.text="name";
dropdownlist1.value="id";
dropdownlist1.dataBind();
<select id="sl">
<%for(int i=0;i<dt.rows.cout;++i)%>
<option value="<%=dt.rows[i]["id"].ToString()%>"><%=dt.rows[i]["name"].ToString()%></option>
</select>
............
winform:
combox1.datasource=dt;
combox1.displaymember="name";
combox1.valuemember="id";
.....