20150812 Asp.net 父窗体获取子窗体的返回值，更新父窗体文本控件（应用）

1. 父窗体

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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

using System.Text;
//using System.Text.StringBuilder;

public partial class Tree1 : System.Web.UI.Page
{

    protected System.Data.SqlClient.SqlConnection SqlConnection1;
    protected System.Data.SqlClient.SqlDataAdapter SqlDataAdapter1;
    protected System.Data.DataSet DataSet1;
    protected System.Data.DataSet DataSet2;
    string Str_sql = "";
    static string Str_selected = "";  // 选中的值
   
   
    protected void Page_Load(object sender, EventArgs e)
    {
        AddTree(0, null);
    }

    private void AddTree(int Pid, TreeNode PNode)
    {
        //string sqlStr = "SELECT Item_id,Item_name,Parent_ID FROM Para_item";
        //DataTable dt = YSqlHelper.ExecuteQuery(sqlStr, CommandType.Text);

        if (!IsPostBack)
        {

            P_ht.H_data P_data = new P_ht.H_data();
            P_data.sql_text1 = "SELECT Item_id,Item_name,Parent_ID FROM Para_item";
            Str_sql = P_data.sql_text1;
            P_data.select_tables();
            DataSet1 = P_data.DataSet8;
            DataTable dt = DataSet1.Tables[0];

            if (dt.Rows.Count > 0)
            {
                DataView dv = new DataView(dt);
                //过滤ParentID,得到当前的所有子节点 ParentID为父节点ID
                dv.RowFilter = "[Parent_ID] = " + Pid;
                //循环递归
                foreach (DataRowView Row in dv)
                {
                    //声明节点
                    TreeNode Node = new TreeNode();
                    //绑定超级链接
                    // Node.NavigateUrl = String.Format("javascript:show('{0}')", Row["Item_Name"].ToString());
                    //开始递归
                    if (PNode == null)
                    {
                        //添加根节点
                        Node.Text = Row["Item_Name"].ToString();
                        this.TreeView1.Nodes.Add(Node);
                        Node.Expanded = true; //节点状态展开
                        AddTree(Int32.Parse(Row["Item_ID"].ToString()), Node);    //再次递归
                    }
                    else
                    {
                        //添加当前节点的子节点
                        Node.Text = Row["Item_Name"].ToString();
                        PNode.ChildNodes.Add(Node);
                        Node.Expanded = true; //节点状态展开
                        AddTree(Int32.Parse(Row["Item_ID"].ToString()), Node);     //再次递归
                    }
                }
            }
        }
    }

    ////
    // 选中节点
    protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
    {
        //this.Label1.Text = TreeView1.SelectedNode.Value.ToString().Trim();
        //this.Label1.Text = TreeView1.SelectedNode.Text.ToString().Trim();
        //Response.Write(TreeView1.SelectedNode.Value.ToString().Trim());
        Str_selected = TreeView1.SelectedNode.Value.ToString().Trim();
        Response.Write(Str_selected);
    }

    // add
    protected void Btn_node_add_Click(object sender, EventArgs e)
    {
       
        P_ht.H_data P_data = new P_ht.H_data();
        if (Str_selected.Trim() == "")
        {
            ClientScriptManager scriptManager = ((Page)System.Web.HttpContext.Current.Handler).ClientScript;
            scriptManager.RegisterStartupScript(typeof(string), "", "alert('提示: 选中的节点为空，您要重新点击节点才能选中节点! ');", true);
            return;
        }
        else
        {
            string str_Parent_ID = "0";
            Int32 i_Item_id = 0;

            //select
            P_data.sql_text1 = " SELECT Item_id,Item_name,Parent_ID FROM Para_item where Item_name = '" + Str_selected.Trim().ToString() +"' ";
            Str_sql = P_data.sql_text1;
            P_data.select_tables();
            DataSet1 = P_data.DataSet8;
            if (DataSet1.Tables[0].Rows.Count > 0)
            {
                str_Parent_ID = DataSet1.Tables[0].Rows[0][0].ToString().Trim();

                P_data.sql_text1 = " SELECT Item_id,Item_name,Parent_ID FROM Para_item order by Item_id desc ";
                Str_sql = P_data.sql_text1;
                P_data.select_tables();
                DataSet1 = P_data.DataSet8;

                i_Item_id =  System.Convert.ToInt32(DataSet1.Tables[0].Rows[0][0].ToString().Trim())+1;
            }
            else
            {
                ClientScriptManager scriptManager = ((Page)System.Web.HttpContext.Current.Handler).ClientScript;
                scriptManager.RegisterStartupScript(typeof(string), "", "alert('提示: 没有找到节点编号， 不能增加节点! ');", true);
                return;
            }

            //add
            P_data.p11_count = "4";  //总数量+1

            P_data.p11_ID = i_Item_id.ToString().Trim(); //编号
            P_data.p11_01 = "月当楼";
            P_data.p11_02 = str_Parent_ID;

            P_data.p21_ID = "t3_01";
            P_data.p21_01 = "t3_02";
            P_data.p21_02 = "t3_03";

            P_data.sql_text1 = "INSERT INTO Para_item (Item_id,Item_name,Parent_ID) VALUES "
                                               + "(@t3_01, @t3_02, @t3_03)";

            P_data.write_tables();
        }

        ////reshfer;

        //TreeNode nodeNew = new TreeNode("月当楼");// 新建节点对象

        //if (TreeView1.SelectedNode == null)
        //{
        //    return;
        //}
        //else
        //{
        //    TreeView1.SelectedNode.ChildNodes.Add(nodeNew);
        //}

        Server.Transfer("Tree1.aspx");

    }

    protected void Btn_node_edit_Click(object sender, EventArgs e)
    {
        P_ht.H_data P_data = new P_ht.H_data();
        if (Str_selected.Trim() == "")
        {
            ClientScriptManager scriptManager = ((Page)System.Web.HttpContext.Current.Handler).ClientScript;
            scriptManager.RegisterStartupScript(typeof(string), "", "alert('提示: 选中的节点为空，您要重新点击节点才能选中节点! ');", true);
            return;
        }
        else
        {
           
            //select

            string str_Parent_ID = "";

            P_data.sql_text1 = " SELECT Item_id,Item_name,Parent_ID FROM Para_item where Item_name = '" + Str_selected.Trim().ToString() + "' ";
            Str_sql = P_data.sql_text1;
            P_data.select_tables();
            DataSet1 = P_data.DataSet8;
            if (DataSet1.Tables[0].Rows.Count > 0)
            {
                str_Parent_ID = DataSet1.Tables[0].Rows[0][0].ToString().Trim();
                Session["Tree1_Edit_name"] = str_Parent_ID;
            }
            else
            {
                ClientScriptManager scriptManager = ((Page)System.Web.HttpContext.Current.Handler).ClientScript;
                scriptManager.RegisterStartupScript(typeof(string), "", "alert('提示: 没有找到节点编号， 不能删除节点! ');", true);
                return;
            }

            //原窗口保留，以对话框形式打开新窗口：
            //Response.Write("<script>window.showModelessDialog('Tree1_edit.aspx')</script>");
            //return;

            //
            StringBuilder s = new StringBuilder();
            s.Append(" <script language=javascript> var a=window.showModalDialog('Tree1_edit.aspx'); ");
            s.Append(" if(a!=null) document.all('TextBox1').value=a;</script> ");
             Type cstype = this.GetType();

            ClientScriptManager cs = Page.ClientScript;
            string sname = "lt";
            if (!cs.IsStartupScriptRegistered(cstype, sname))
            cs.RegisterStartupScript(cstype, sname, s.ToString());
            return;
           
            //
            P_data.sql_text1 = "update Para_item set Item_name = '户部巷' "
                                                  + " where Item_id =  " + str_Parent_ID.Trim().ToString() + " ";

            P_data.update_tables();
        }

        ////reshfer;

        //if (TreeView1.SelectedNode == null)
        //{
        //    return;
        //}
        //else
        //{
        //    TreeView1.SelectedNode.Value = "户部巷";
        //    TreeView1.SelectedNode.Text = "户部巷";
        //}

        Server.Transfer("Tree1.aspx");
    }

    // delete
    protected void Btn_node_delete_Click(object sender, EventArgs e)
    {
        P_ht.H_data P_data = new P_ht.H_data();
        if (Str_selected.Trim() == "")
        {
            ClientScriptManager scriptManager = ((Page)System.Web.HttpContext.Current.Handler).ClientScript;
            scriptManager.RegisterStartupScript(typeof(string), "", "alert('提示: 选中的节点为空，您要重新点击节点才能选中节点! ');", true);
            return;
        }
        else
        {
            //select

            string str_num_ID = "";
            string str_Parent_ID = "";

            P_data.sql_text1 = " SELECT Item_id,Item_name,Parent_ID FROM Para_item where Item_name = '" + Str_selected.Trim().ToString() + "' ";
            Str_sql = P_data.sql_text1;
            P_data.select_tables();
            DataSet1 = P_data.DataSet8;
            if (DataSet1.Tables[0].Rows.Count > 0)
            {
                str_num_ID = DataSet1.Tables[0].Rows[0][0].ToString().Trim();
                str_Parent_ID = DataSet1.Tables[0].Rows[0][2].ToString().Trim();
            }
            else
            {
                ClientScriptManager scriptManager = ((Page)System.Web.HttpContext.Current.Handler).ClientScript;
                scriptManager.RegisterStartupScript(typeof(string), "", "alert('提示: 没有找到节点编号， 不能删除节点! ');", true);
                return;
            }

            // 如果有子节点提示先删除子节点，否则不予删除。( 另一种方法是写代码，用递归的方法找到所有的子节点，批量性删除 )
            P_data.sql_text1 = " SELECT Item_id,Item_name,Parent_ID FROM Para_item where Parent_ID = '" + str_num_ID.Trim().ToString() + "' ";
            Str_sql = P_data.sql_text1;
            P_data.select_tables();
            DataSet1 = P_data.DataSet8;
            if (DataSet1.Tables[0].Rows.Count > 0)
            {
                ClientScriptManager scriptManager = ((Page)System.Web.HttpContext.Current.Handler).ClientScript;
                scriptManager.RegisterStartupScript(typeof(string), "", "alert('提示: 不能删除, 先删除所有子节点后才都能删除父节点! ');", true);
                return;
            }
            else
            {
                P_data.sql_text1 = " delete from Para_item where Item_id = " + str_num_ID.Trim().ToString() + " ";
                P_data.update_tables();
            }
        }

        //reshfer;
        Server.Transfer("Tree1.aspx");

    }

}

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2. 子窗体

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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

using System.Text;
//using System.Text.StringBuilder;

public partial class Tree1_edit : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            if (Session["Tree1_Edit_name"] != null)
            {
                this.TextBox1.Text = Session["Tree1_Edit_name"].ToString();
            }
            else
            {
                this.TextBox1.Text = "";
            }
        }
    }

    protected void Btn_confirm_Click(object sender, EventArgs e)
    {
        //Response.Write("<script>window.close();</script>");// 会弹出询问是否关闭
        //Response.Write("<script>window.opener=null;window.close();</script>");// 不会弹出询问

        // 不会弹出询问
        //ClientScript.RegisterStartupScript(Page.GetType(), "", "<script language=javascript>window.opener=null;window.open('','_self');window.close();</script>");

        //Response.Write("<script>window.returnValue=1;window.close();</script>");

        //
        StringBuilder s = new StringBuilder();
        s.Append("<script language=javascript>" + " window.returnValue='" + this.TextBox1.Text.Trim().ToString() + "';" + " window.close();" + " </script>");
        Type cstype = this.GetType();
        ClientScriptManager cs = Page.ClientScript;
        string csname = "ltype";
        if (!cs.IsStartupScriptRegistered(cstype, csname))
            cs.RegisterStartupScript(cstype, csname, s.ToString());

        //Response.Write("<script language=javascript>opener.location.href=opener.location.href;</script>");

    }

}

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