通过选中树视图的子节点复选框,将行添加到datagridview

本文关键字:添加 datagridview 复选框 子节点 视图 | 更新日期: 2023-09-27 18:21:21

我是C#的新手,正在进行第一个项目。

我有一个WINFORM,它显示一个树节点和一个数据网格视图。我希望从树节点中选择的项目转到数据网格视图。如果我选择treenode的父节点,所有子节点都会进入datagridview,但如果我只是展开父节点并选择其中一个子节点,则不会进入datagrid。(树节点的选择激发了一种从sql表中获取项目属性的方法,它是进入网格+节点值的属性)

当选择父级时,"if(e.Node.Nodes.Count>0)"为true。如果未选择父项,但子项为"if(e.Node.Nodes.Count>0)",则为false。

所以我的问题是,我需要什么代码来查找已检查/未检查的子节点?

一旦我得到了正确的代码来查找子节点检查,如果子节点未检查,什么代码会将其移动到数据网格或从数据网格中删除?

   private void getChildNodesToGrid()
    {
        // get all child nodes add to dataGridView
        DataTable dt = getFieldsTable();
        dgvColumns.DataSource = dt;
        getAttributeSIDs();
    }
private void tvFileMan_AfterCheck(object sender, TreeViewEventArgs e)
    {
        getFileAndColumns();
        if (e.Node.Nodes.Count > 0)
        {
           this.CheckAllChildNodes(e.Node, e.Node.Checked);
            // Checked a file so get fields and check all fields except subfiles.
            // Use this event handler to process actions from check box click
            e.Node.Expand();
            foreach (TreeNode tn in e.Node.Nodes)
            {
                if (tn.Nodes.Count.Equals(0))
                    tn.Checked = e.Node.Checked;
            }
            getChildNodesToGrid();
 }       

谢谢,但我已经有了所有这些,我正在将所有节点放到网格中。我遇到的问题是限制从filNode.nodes检查的子节点。我一直在玩"if(fileNode.checked)",但从来都不是真的,即使我可以在即时窗口中打印它

?fileNode.Nodes[2]
{Text = "1  - CARD COLOR"}
    base: {Text = "1  - CARD COLOR"}
    BackColor: "{Name=0, ARGB=(0, 0, 0, 0)}"
    Bounds: {X = 76 Y = 176 Width = 92 Height = 16}
    Checked: true


  private DataTable getFieldsTable()
    {
        //original
        DataTable dt = new DataTable();
        dt.Columns.Add("ColumnName");
        dt.Columns.Add("FMFieldName");
.
.
.
        dt.Columns.Add("PointsToFileNumber");
        TreeNode fileNode = tvFileMan.SelectedNode;
        foreach (TreeNode tn in fileNode.Nodes)
        {
            if (tn.Nodes.Count == 0)
            {   
                if (fileNode.Checked)
                {
                 DataRow dr = dt.NewRow();
                dr["FMFieldName"] = tn.Text.Substring(tn.Text.IndexOf("  - ") + 4);
                dr["FMFieldNumber"] = tn.Tag.ToString();
                dr["FMFileNumber"] = tn.Parent.Tag.ToString();
                dr["ColumnName"] = suggestName(tn.Text.Substring(tn.Text.IndexOf("  - ") + 4));
                //added by TEA 9/3/14 to get PointsToFileNumber in TreeNode
                if (dr["PointsToFileNumber"].ToString().Length > 0)
                {
                    dr["ColumnName"] = suggestName(tn.Text.Substring(tn.Text.IndexOf("  - ") + 4) + "txt");
                }
                dt.Rows.Add(dr);
                }
            }
        }
        return dt;
    }

通过选中树视图的子节点复选框,将行添加到datagridview

使Datatable成为私有成员变量,并在检查父节点时向其添加记录:

//The DataTable is now a private member variable and is accessible in the tvFileMan_AfterCheck event 
private DataTable dt = getFieldsTable();
private void getChildNodesToGrid()
   {
        dgvColumns.DataSource = dt; //this binds the DataTable to the GridView
        getAttributeSIDs();
    }
private void tvFileMan_AfterCheck(object sender, TreeViewEventArgs e)
    {
        getFileAndColumns();
        if (e.Node.Nodes.Count > 0)
        {
           this.CheckAllChildNodes(e.Node, e.Node.Checked);
            e.Node.Expand();
            foreach (TreeNode tn in e.Node.Nodes)
            {
                if (tn.Nodes.Count.Equals(0))
                    tn.Checked = e.Node.Checked;
            }
            //HERE Add the treenode(s) to the DataTable
            DataRow dr = dt.NewRow();
            dr[0] = "e.Node.Text";
            dt.Rows.Add(dr);
            getChildNodesToGrid();
 }       

在AfterCheck中添加了一个'else',因此它只需调用getChildNodesToGrid()

然后,我更新了私有DataTable getFieldsTable(),添加了一个计数器和条件"if(fileNode.Nodes[cnt].Checked)"。同样,我不知道这是否是正确的编程,但似乎有效。

    private void tvFileMan_AfterCheck(object sender, TreeViewEventArgs e)
    {
        getFileAndColumns();
        if (e.Node.Nodes.Count > 0)
        {
           //this.CheckAllChildNodes(e.Node, e.Node.Checked);
            // Checked a file so get fields and check all fields except subfiles.
            e.Node.Expand();
            foreach (TreeNode tn in e.Node.Nodes)
            {
                if (tn.Nodes.Count.Equals(0))
                    tn.Checked = e.Node.Checked;
            }
            getChildNodesToGrid();
        }
        else
        {
            e.Node.Expand();
                //if (tn.Nodes.Count.Equals(0))
                if (e.Node.Checked)
                {
                    //tn.Checked = e.Node.Checked;
                    getChildNodesToGrid();
                }
        }
   private DataTable getFieldsTable()
    {
        //original
        DataTable dt = new DataTable();
        dt.Columns.Add("ColumnName");
        dt.Columns.Add("FMFieldName");
        dt.Columns.Add("FMFieldNumber");
        dt.Columns.Add("FMFileNumber");
        dt.Columns.Add("FMFieldType");
        dt.Columns.Add("ResolvedValue");
        dt.Columns.Add("PointsToFileNumber");
        TreeNode fileNode = tvFileMan.SelectedNode;
        int cnt = 0;
        foreach (TreeNode tn in fileNode.Nodes)
        {
            if (tn.Nodes.Count == 0)
            {   
                if (fileNode.Nodes[cnt].Checked)
                {
                 DataRow dr = dt.NewRow();
                dr["FMFieldName"] = tn.Text.Substring(tn.Text.IndexOf("  - ") + 4);
                dr["FMFieldNumber"] = tn.Tag.ToString();
                dr["FMFileNumber"] = tn.Parent.Tag.ToString();
                dr["ColumnName"] = suggestName(tn.Text.Substring(tn.Text.IndexOf("  - ") + 4));
                //added by TEA 9/3/14 to get PointsToFileNumber in DataGrid
                if (dr["PointsToFileNumber"].ToString().Length > 0)
                {
                    dr["ColumnName"] = suggestName(tn.Text.Substring(tn.Text.IndexOf("  - ") + 4) + "txt");
                }
                dt.Rows.Add(dr);
                }
                cnt++;
            }
        }
        return dt;
    }
   private void getFileAndColumns()
    {
        label4.Visible = false;
        label5.Visible = false;
        btAllFields.Visible = false;
        cbComputed.Checked = false;
        TreeNode node = tvFileMan.SelectedNode;
        if (node == null) return;
        // Is it a File or Field?
        if (node.Index == 0) return;
        if (node.Nodes.Count > 0)
        {
            // FileManFile selected.
            // Check AttributeMap for this file. If found, fill in textboxes with that info.
            // Otherwise, suggest a name for the table.
            tbFileNumber.Text = node.Tag.ToString();
            tbFileName.Text = node.Text.Substring(node.Text.IndexOf("  - ") + 4);
            tbTableName.Text = "xxxx." + (suggestName(tbFileName.Text) + "F" + tbFileNumber.Text.Replace('.', 'x'));
            label4.Text = "To select all fields push button to the right. 'nOtherwise double-click fields to add them one at a time.";
            label4.Visible = true;
            btAllFields.Visible = true;
            dgvColumns.DataSource = null;
            dgvPKIENS.DataSource = getPKIENSTable();
            getPKIENSIDs();
        }
        else
        {
            // FileMan Field selected.
        }

    }