1、递归函数

//'递归遍历自建目录树＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

privatevoidShowDir(stringsZml,stringsIndex)
{
System.Data.SqlClient.SqlConnectionsqlCon=newSystem.Data.SqlClient.SqlConnection(connectionString);
stringsqlStr="select*frommltablewheremlzml=N'"+sZml+"'";
System.Data.SqlClient.SqlDataAdaptersqlAda=newSystem.Data.SqlClient.SqlDataAdapter(sqlStr,sqlCon);
System.Data.DataTableDt=newDataTable();
sqlAda.Fill(Dt);
Microsoft.Web.UI.WebControls.TreeNodeNode1;
stringsIndex0;
stringsIndex2;
inttheId;

intsIndex1=0;//记录树的最后一位值
foreach(System.Data.DataRowDtDataRowinDt.Rows)
{
theId=Convert.ToInt32(DtDataRow["mlid"]);
Node1=newMicrosoft.Web.UI.WebControls.TreeNode();
Node1.Text=DtDataRow["mlmc"].ToString();
Node1.ImageUrl="images/trees/folder.gif";
Node1.ExpandedImageUrl="images/trees/folderopen.gif";
Node1.Expanded=false;
Node1.NavigateUrl="Admin_Tree_Show.aspx?theid="+theId+"&sIndex="+sIndex+"."+sIndex1.ToString();
Node1.ID="";
Node1.Target="main";
if(sIndex=="")
{
sIndex2=TreeView1.Nodes.IndexOf(Node1).ToString();
sIndex0=sIndex2;

}
else
{

Microsoft.Web.UI.WebControls.TreeNodepNode=TreeView1.GetNodeFromIndex(sIndex);
pNode.Nodes.Add(Node1);
sIndex2=pNode.Nodes.IndexOf(Node1).ToString();
sIndex0=sIndex+"."+sIndex2;
sIndex1++;//记录当前树下叶子的个数，即当前叶子的号
}
ShowDir(DtDataRow["mlid"].ToString(),sIndex0);


}
sqlCon.Close();

}

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