DropDownList手动构造一个下拉树形代码,Asp.Net代码库,德仔网

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【Asp.Net】 DropDownList手动构造一个下拉树形
作者:CSDN / 发布于2012/1/11/ 1073
<div><span style="color: rgb(0,0,255)">private</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">void</span><span style="color: rgb(0,0,0)"> bindDDL(DropDownList DDL, DataSet ds, </span><span style="color: rgb(0,0,255)">int</span><span style="color: rgb(0,0,0)"> ParentID, </span><span style="color: rgb(0,0,255)">string</span><span style="color: rgb(0,0,0)"> Tab)
{
DataView dv </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">new</span><span style="color: rgb(0,0,0)"> DataView(ds.Tables[</span><span style="color: rgb(128,0,128)">0</span><span style="color: rgb(0,0,0)">]);
 dv.RowFilter </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">ParentId=</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,0)">+</span><span style="color: rgb(0,0,0)"> ParentID.ToString();
 </span><span style="color: rgb(0,0,255)">int</span><span style="color: rgb(0,0,0)"> count </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,0,128)">0</span><span style="color: rgb(0,0,0)">;
 </span><span style="color: rgb(0,0,255)">foreach</span><span style="color: rgb(0,0,0)"> (DataRowView Row </span><span style="color: rgb(0,0,255)">in</span><span style="color: rgb(0,0,0)"> dv)
 {
 count</span><span style="color: rgb(0,0,0)">++</span><span style="color: rgb(0,0,0)">;
 </span><span style="color: rgb(0,0,255)">if</span><span style="color: rgb(0,0,0)"> (Tab.IndexOf(</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">├</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">) </span><span style="color: rgb(0,0,0)">></span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,0)">-</span><span style="color: rgb(128,0,128)">1</span><span style="color: rgb(0,0,0)">)
 {
 Tab </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> Tab.Replace(</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">├</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">│</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">);
 }
 </span><span style="color: rgb(0,0,255)">if</span><span style="color: rgb(0,0,0)"> (Tab.IndexOf(</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">└</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">) </span><span style="color: rgb(0,0,0)">></span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,0)">-</span><span style="color: rgb(128,0,128)">1</span><span style="color: rgb(0,0,0)">)
 {
 Tab </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> Tab.Replace(</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">└</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)"></span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">);
 }
 </span><span style="color: rgb(0,0,255)">if</span><span style="color: rgb(0,0,0)"> (dv.Count </span><span style="color: rgb(0,0,0)">==</span><span style="color: rgb(0,0,0)"> count)
 {
 Tab </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> Tab </span><span style="color: rgb(0,0,0)">+</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">└</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">;
 }
 </span><span style="color: rgb(0,0,255)">else</span><span style="color: rgb(0,0,0)">
 {
 Tab </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> Tab </span><span style="color: rgb(0,0,0)">+</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">├</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">;
 }
 dropMenuML.Items.Add(</span><span style="color: rgb(0,0,255)">new</span><span style="color: rgb(0,0,0)"> ListItem(Tab </span><span style="color: rgb(0,0,0)">+</span><span style="color: rgb(0,0,0)"> Row[</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">MenuName</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">].ToString(), Row[</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">ID</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">].ToString()));
 bindDDL(dropMenuML, ds, Convert.ToInt32(Row[</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">ID</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">].ToString()), Tab);
 Tab </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> Tab.Remove(Tab.Length </span><span style="color: rgb(0,0,0)">-</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,0,128)">1</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,128)">1</span><span style="color: rgb(0,0,0)">);
 }
</span><span style="color: rgb(0,0,255)">private</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">void</span><span style="color: rgb(0,0,0)"> ShowData()
 {
 </span><span style="color: rgb(0,0,255)">this</span><span style="color: rgb(0,0,0)">.dropMenuML.DataTextField </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">MenuName</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">;
 </span><span style="color: rgb(0,0,255)">this</span><span style="color: rgb(0,0,0)">.dropMenuML.DataValueField </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">ID</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">;
 MenuBll bll</span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,255)">new</span><span style="color: rgb(0,0,0)"> MenuBll();
 DataSet ds </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> bll.GetList(</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">MenuName,ID,ParentId,Url</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">MenuManage</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,0)">""</span><span style="color: rgb(0,0,0)">);
 </span><span style="color: rgb(0,128,0)">//</span><span style="color: rgb(0,128,0)">GetList就是一个查询列表select * from MenuManage;</span><span style="color: rgb(0,128,0)">
</span><span style="color: rgb(0,0,0)"> bindDDL(dropMenuML, ds, </span><span style="color: rgb(128,0,128)">0</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,0)">""</span><span style="color: rgb(0,0,0)">);
 dropMenuML.Items.Add(</span><span style="color: rgb(0,0,255)">new</span><span style="color: rgb(0,0,0)"> ListItem(</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">----Please Choose----</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(128,0,0)">0</span><span style="color: rgb(128,0,0)">"</span><span style="color: rgb(0,0,0)">));
 dropMenuML.SelectedIndex </span><span style="color: rgb(0,0,0)">=</span><span style="color: rgb(0,0,0)"> dropMenuML.Items.Count </span><span style="color: rgb(0,0,0)">-</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,0,128)">1</span><span style="color: rgb(0,0,0)">;
 }
</span></div>
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