Question

我正在学习C＃编程语言，正在为SAP business One制作工资单应用程序插件。我以前从未使用过treeview，想知道如何从数据库中填充树项。我正在使用Visual Studio 2010和Microsoft SQL Server 2008。

我有一个有两个孩子的父母，即

- Component                        ....Parent
      Earnings                     ....child
      Deductions                   ....child

我希望收入子项显示U_PD_description字段的所有结果，其中U_PD_type =“收入”，即

- Component                        ....Parent
          Earnings                     ....child
              Housing Allowance
              Mobile Phone Allowance
              Mileage Allowance
          Deductions                   ....child

同样适用于扣除。我有以下codeload代码：

 private void frm_earn_deduct_setup_Load(object sender, EventArgs e)
        {
            // Get service instance
            var earnDeductMasterService = Program.Kernel.Get<IEarnDeductMasterService>();

            //Query database for all records that have earnings
            var earnings = from ed in earnDeductMasterService.GetAllEarnDeductMasters()
                           where ed.U_PD_type.Trim().Equals("Earnings".Trim(), StringComparison.CurrentCultureIgnoreCase)
                           select ed;

            if (earnings.Any(x => x != null))
            {
                //To populate subtree Earnings with U_PD_description results
                //.....some code here
            }
            else 
            {
                //Nothing to populate            
            }

            //.............................................................................
            //Query database for all records that have deductions
            var deductions = from ed in earnDeductMasterService.GetAllEarnDeductMasters()
                             where ed.U_PD_type.Trim().Equals("Deductions".Trim(), StringComparison.CurrentCultureIgnoreCase)
                             select ed;

            if (deductions.Any(x => x != null))
            {
                //To populate subtree Deductions with U_PD_description results
                //.....some code here
            }
            else
            {
                //Nothing to populate            
            }

            // Disable default items
            txt_amt_greater_than.Enabled = false; 
            bindingNavigatorDeleteItem.Enabled = false;

            // Call service instance
            earnDeductMasterBindingSource.DataSource = Program.Kernel.Get<IEarnDeductMasterService>().GetAllEarnDeductMasters().ToList();
        }

有人能告诉我一个如何填充说明treeView1中的收益子树的示例吗？

Answer 1

如果我理解了你想要的东西，那么这里是如何填充treeview的例子：

List<string> earnings = new List<string>() { "Housing Allowance", "Mobile Phone Allowance", "Mileage Allowance" };
List<string> deductions = new List<string>() { "Housing Ban", "Mobile Phone Ban", "Mileage Ban" };

treeView1.Nodes.Add("Component");//adding root node
treeView1.Nodes[0].Nodes.Add("Earnings");//adding earnings child node
treeView1.Nodes[0].Nodes.Add("Deductions");//adding deduction child node

//adding all earnings to "Earnings" node
foreach (string earning in earnings)
{
    treeView1.Nodes[0].Nodes[0].Nodes.Add(earning);
}

//adding all deductions to "Deductions" node
foreach (string deduction in deductions)
{
    treeView1.Nodes[0].Nodes[1].Nodes.Add(deduction);
}

Answer 2

我不想硬编码序数值，而是希望以XML格式提取数据然后遍历XML，递归地填充树视图

C＃从数据库结果填充树视图

2 个答案: