Question

我在winform应用程序中使用DevExpress，我有一个gridview，数据输入表单，datanavigator，都绑定到数据集。

我想添加新记录，如果使用datanavigator“添加”它运行良好，如何使用“新记录”按钮执行相同操作？

BindingSource.AddNew()

通常不起作用，但是使用devexpress它不起作用。

Answer 1

如果要使用绑定，请将对象与绑定源一起使用..

并使用绑定列表.AddingNew += new AddingNewEventHandler(listOfParts_AddingNew); event添加新的实体对象..

请参阅MSDN上的BindingList示例。

void listOfParts_AddingNew(object sender, AddingNewEventArgs e)
        {
            e.NewObject = new Part(textBox1.Text, int.Parse(textBox2.Text));

        }

DevExpress WinForm控件与绑定源相比如此快速，与类型化数据源等相比......你可以使用这些示例实现bindingSources ..

将gridview和关联控件数据源设置为bindsouce您已创建的... 使用此MSDN示例处理您的表单..

看看这段代码片段。可能你会从中得到一些想法..

private void BindingLIstDemo_Load(object sender, EventArgs e)
        {
            InitializeListOfEmployees();
            BindlstEmp();
            listofEmp.AddingNew += new AddingNewEventHandler(listOfEmp_AddingNew);
            listofEmp.ListChanged += new ListChangedEventHandler(listofEmp_ListChanged);

        }

        private void BindlstEmp()
        {
            lstEmpList.Items.Clear();
            lstEmpList.DataSource = listofEmp;
            lstEmpList.DisplayMember = "Name";

        }

        void listofEmp_ListChanged(object sender, ListChangedEventArgs e)
        {
            MessageBox.Show(e.ListChangedType.ToString());
                //throw new NotImplementedException();
        }

        //declare list of employees
        BindingList<Emp> listofEmp;
        private void InitializeListOfEmployees()
        {

            //throw new NotImplementedException();
            // Create the new BindingList of Employees.
            listofEmp = new BindingList<Emp>();

            // Allow new Employee to be added, but not removed once committed.
            listofEmp.AllowNew = true;
            listofEmp.AllowRemove = true;

            // Raise ListChanged events when new Employees are added.
            listofEmp.RaiseListChangedEvents = true;

            // Do not allow Employee to be edited.
            listofEmp.AllowEdit = false;

            listofEmp.Add(new Emp(1, "Niranjan", 10000));
            listofEmp .Add (new Emp (2,"Jai", 8000));

          }


        // Create a new Employee from the text in the two text boxes.
        void listOfEmp_AddingNew(object sender, AddingNewEventArgs e)
        {
            e.NewObject = new Emp (Convert.ToInt32(txtId.Text), txtName.Text,Convert.ToInt32(txtSalary.Text));

        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            Emp empItem = listofEmp.AddNew();
            txtId.Text = txtName.Text = txtSalary.Text = "";
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form1 obj = new Form1();
            obj.Show();
        }

        private void btnDelete_Click(object sender, EventArgs e)
        {
            var sg = (from sc in listofEmp.ToList<Emp>() where sc.Name == ((Emp)lstEmpList.SelectedValue).Name select sc);





        }

        private void lstEmpList_SelectedIndexChanged(object sender, EventArgs e)
        {
            Emp se = listofEmp[lstEmpList.SelectedIndex];
            txtId.Text = se.Id.ToString();
            txtName.Text = se.Name;
            txtSalary.Text = se.Salary.ToString();

        }

这里我使用BindingList作为数据BindingList<Emp> listofEmp;，并且在列表框控件中显示记录网格列表的位置..但是所有相同的...尝试使用gridview .. < / p>

DevExpress DataBinding，添加新记录

1 个答案: