在树状视图中显示数据 [英] DISPLAYING DATA IN TREE VIEW

问题描述

我在单个表中的国家/地区和城市关系中有一个父级儿童关系数据库，因此我可以在树状视图中始终显示该关系，而该树状节点始终是一个国家/地区.但是，如果我在文本框中输入了州名"，我该怎么办
然后，我的树视图应将此州名"显示为根节点，并且还应将该州的所有城市都显示为该州名的儿童节点

我在C#中编写我的代码


请帮助我，我必须在我的项目紧急中执行此操作！!!!!!!!!!!!!!

I HAVE A PARENT CHILD RELATIONSHIP DATABASE IN A SINGLE TABLE LIKE COUNTRY STATE AND CITIES RELATIONSHIP, I CAN DISPLAY WHOLE THE RELATIONSHIP IN THE TREE VIEW WHOSE ROOT NODE IS ALWAYS COUNTRY. BUT WHAT I WANT THAT IF I ENTERED A "STATE NAME" IN A TEXTBOX
THEN MY TREE VIEW SHOULD DISPLAY THIS "STATE NAME" AS ROOT NODE AND ALSO SHOW ALL THE CITIES OF THIS STATE AS CHILD NODE OF THIS STATE NAME

I M WRITING MY CODE IN C#


PLEASE HELP ME I HAVE TO IMPLEMENT THIS IN MY PROJECT URGENT PLEASE!!!!!!!!!!!!!

推荐答案

每当有人乞求紧急答案时通常表示作业分配.

因此，请在此处开始 [

Whenever anyone begs for an urgent answer it usually indicates a homework assignment.

So, start here[^] or go back to your tutor and explain that you don''t understand. They will help you.

尝试这些方法.将过滤条件更改为数据表列.


私有void CountryTree()
{

DataSet dsLevels =(DataSet)ViewState ["DataSet"];
treeEx.Nodes.Clear();
treeEx.Nodes.Add(new TreeNode("India"，"01"));

foreach(treeEx.Nodes中的TreeNode tn)
{
DataRow [] drlevels = dsLevels.Tables [0] .Select();
int i = 0;
foreach(drlevel中的DataRow drlevel)
{
tn.ChildNodes.Add(new TreeNode(drlevel ["description"].ToString()，drlevel ["value"].ToString()));

ChildTreeNode(tn.ChildNodes [i]，dsLevels.Tables [0]);
i ++;
}
}
}

私有void ChildTreeNode(TreeNode childNode，DataTable dt)
{
试试
{
DataRow [] dr = dt.Select("parentId =" + childNode.Value);
int i = 0;
foreach(dr中的DataRow drlevel)
{
childNode.ChildNodes.Add(new TreeNode(drlevel ["description"].ToString()，drlevel ["value"].ToString()));
如果(dt.Select("parentId =" + drlevel ["value"].ToString()).长度> 0)
{
ChildTreeNode(childNode.ChildNodes [i]，dt);
i ++;
}
}
}
catch(ex ex例外)
{
}
}

try this these methods. change filter conditions as your datatable columns.


private void CountryTree()
{

DataSet dsLevels = (DataSet)ViewState["DataSet"];
treeEx.Nodes.Clear();
treeEx.Nodes.Add(new TreeNode("India", "01"));

foreach (TreeNode tn in treeEx.Nodes)
{
DataRow[] drlevels = dsLevels.Tables[0].Select();
int i = 0;
foreach (DataRow drlevel in drlevels)
{
tn.ChildNodes.Add(new TreeNode(drlevel["description"].ToString(), drlevel["value"].ToString()));

ChildTreeNode(tn.ChildNodes[i], dsLevels.Tables[0]);
i++;
}
}
}

private void ChildTreeNode(TreeNode childNode, DataTable dt)
{
try
{
DataRow[] dr = dt.Select("parentId=" + childNode.Value);
int i = 0;
foreach (DataRow drlevel in dr)
{
childNode.ChildNodes.Add(new TreeNode(drlevel["description"].ToString(), drlevel["value"].ToString()));
if (dt.Select("parentId=" + drlevel["value"].ToString()).Length > 0)
{
ChildTreeNode(childNode.ChildNodes[i], dt);
i++;
}
}
}
catch (Exception ex)
{
}
}

抱歉，如果您可以帮助他们，则不是家庭作业，而是办公室工作.........

SORRY SIR BUT ITS NOT A HOMEWORK ITS A OFFICE WORK IF YOU CAN HELP THEN HELP.........

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