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问题描述
嗨！
我将xml加载到datagridview。这是有效的。我做了一些改变后再把它保存下来。这也有效。
现在我添加了一些DataGridViewComboBoxCell。现在，当我在组合框中进行一些更改并将其保存回来时，更改不在xml中。是什么让我错了？
感谢您的帮助！
hi!
I load a xml to a datagridview. this is working. afer I have made some changes I save it back. this also works.
now I have add some DataGridViewComboBoxCell. Now when I make some changes in the combobox and save it back the changes are not in the xml. What make I wrong?
Thanks for your help!
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Xml;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
DataTable dt = new DataTable();
DataTable tbl3 = new DataTable();
DataSet dataSet3 = new DataSet();
private void getDataSource()
{
//dt.Columns.Add("Parameter");
//dt.Columns.Add("Proc_key 1");
//dt.Columns.Add("Machine_ID");
//dt.Columns.Add("Active");
//dt.Rows.Add("Uniformity", "PM1", "ED2","1");
//dt.Rows.Add("Uniformity", "PM2", "ED2", "2");
//dt.Rows.Add("Uniformity_release_hot", "PM1", "ED2", "1");
string xmlFile3 = "c:\\Proj\\Epcos\\neo2000\\_versionen\\v11\\Neo2000_Host\\Epcos_Files\\XML\\SPC_Config.xml";
dataSet3.ReadXml(xmlFile3, XmlReadMode.InferSchema);
//dataGridView2.DataSource = dataSet2.Tables[0];
//dataGridView3.DataSource = dataSet3.Tables[0];
}
private void Form1_Load(object sender, EventArgs e)
{
// just fill the datatable dt
getDataSource();
// table dt has four column index 0,1,2,3
dataGridView1.DataSource = dataSet3.Tables[0];
// dataGridView1.DataSource = dataSet3;
tbl3 = dataSet3.Tables[0];
//DataGridViewColumn column = dataGridView1.Columns[0];
//column.Width = 200;
// create Combo Box Cell PROC_KEY 1
DataGridViewComboBoxCell bc1 = new DataGridViewComboBoxCell();
//if want to add the fix value in ComboBox
bc1.Items.AddRange("PM1", "PM2");
//Add new colum to grid with Combobox
DataGridViewColumn cc1 = new DataGridViewColumn(bc1);
dataGridView1.Columns.Add(cc1);
//Add Header from old column to new column with combobox
dataGridView1.Columns[4].HeaderText = dataGridView1.Columns[1].HeaderText;
// set the value in combobox
foreach (DataGridViewRow item in dataGridView1.Rows)
{
item.Cells[4].Value = item.Cells[1].Value;
}
//Disable old Column - so only new column with combobox will be displayed
dataGridView1.Columns[1].Visible = false;
dataGridView1.Columns[4].ToolTipText = "Select Module";
//----------------------------------------------------------------------------------
//Same routin for other Column (MACHINE_ID)
DataGridViewComboBoxCell bc2 = new DataGridViewComboBoxCell();
//if want to add the fix value in ComboBox
bc2.Items.AddRange("ED1", "ED2");
//Add new column to grid with Combobox
DataGridViewColumn cc2 = new DataGridViewColumn(bc2);
dataGridView1.Columns.Add(cc2);
//Add Header from old Column to new column with combobox
dataGridView1.Columns[5].HeaderText = dataGridView1.Columns[2].HeaderText;
// set the value in combobox
foreach (DataGridViewRow item in dataGridView1.Rows)
{
item.Cells[5].Value = item.Cells[2].Value;
}
//Disable old Column - so only new column with combobox will be displayed
dataGridView1.Columns[2].Visible = false;
dataGridView1.Columns[5].ToolTipText = "Select Equipment";
//----------------------------------------------------------------------------------
//Same routin for other Column (MACHINE_ID)
DataGridViewComboBoxCell bc3 = new DataGridViewComboBoxCell();
//if want to add the fix value in ComboBox
bc3.Items.AddRange("1", "2");
DataGridViewColumn cc3 = new DataGridViewColumn(bc3);
dataGridView1.Columns.Add(cc3);
//Add Header from old column to new colun with combobox
dataGridView1.Columns[6].HeaderText = dataGridView1.Columns[3].HeaderText;
// set the value in combobox
foreach (DataGridViewRow item in dataGridView1.Rows)
{
item.Cells[6].Value = item.Cells[3].Value;
}
//Disable old Column - so only new column with combobox will be displayed
dataGridView1.Columns[3].Visible = false;
dataGridView1.Columns[6].ToolTipText = "1=active | 2=inactive";
/* if you want to get the existing value in gender column
* and display them in ComboBox
*/
// var ss = dt.AsEnumerable()
// .Select(_ => _.Field<string>("gender")).
// .Distinct();
// bc.Items.AddRange(ss.ToArray());
}
private void btn_saveXML_Click(object sender, EventArgs e)
{
string path = "Config_neu.xml";
DataSet ds = new DataSet();
ds = ((DataTable)dataGridView1.DataSource).DataSet;
ds.Tables[0].WriteXml(path, System.Data.XmlWriteMode.IgnoreSchema);
}
}
}
什么我试过了：
我在互联网上搜索并检查了一些变化但没有任何效果。
What I have tried:
I have searched in the internet and check some changes but nothing works.
推荐答案
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;
namespace TestForm1
{
/// <summary>
/// Test data grid with BindingList.
/// Replace column with ComboBox.
/// Replace date column with class CalendarColumn.
/// </summary>
public partial class Form5 : Form
{
public BindingList<dgvClass1> bindingList;
public Form5()
{
InitializeComponent();
// Allow user to resize column widths.
this.dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.None;
this.dataGridView1.AllowUserToAddRows = false;
this.dataGridView1.DataBindingComplete += (s, ev) => Debug.WriteLine("BindingComplete");
//this.dataGridView1.CurrentCellDirtyStateChanged += new DataGridViewRowEventHandler(this.DataGridChanged);
this.dataGridView1.CellValueChanged += new DataGridViewCellEventHandler(this.dataGridView1_CellValueChanged);
this.dataGridView1.RowValidated += new DataGridViewCellEventHandler(this.RowValidatedEvent);
}
/// <summary>
/// Fill the BindingList and set the dataGridView1.DataSource.
/// See:
/// http://stackoverflow.com/questions/21333320/converting-column-in-datagridview-into-a-combobox
/// http://www.codeproject.com/Articles/24656/A-Detailed-Data-Binding-Tutorial
/// </summary>
private void button1_Click(object sender, EventArgs e)
{
bindingList = new BindingList<dgvClass1>();
bindingList.AllowNew = true;
bindingList.AllowRemove = true;
if (this.dataGridView1.DataSource != null)
{
this.dataGridView1.DataSource = null;
this.dataGridView1.Columns.Remove("Priority");
}
this.AddTestData();
this.AddComboBox();
this.AddCalendarColumn();
bindingList.AddingNew += (s, ev) => Debug.WriteLine("AddingNew");
bindingList.ListChanged += (s, ev) => Debug.WriteLine("ListChanged");
}
/// <summary>
/// http://www.codeproject.com/Articles/38972/Nullable-datetime-column-in-NET-DataGrid-with-Date
/// </summary>
private void AddTestData()
{
// Add row with test data.
var item = new dgvClass1();
item.Number = 1;
item.Name = "Test data1";
item.priority = "Low"; // Not visible field will be used in ComboBox later.
bindingList.Add(item);
// Add row with test data.
item = new dgvClass1();
item.Number = 2;
item.Name = "Test data2";
item.date = item.date.AddMonths(1);
bindingList.Add(item);
// Add row with test data.
item = new dgvClass1();
item.Number = 3;
item.Name = "Test data3";
item.date = item.date.AddMonths(2);
bindingList.Add(item);
var clone = (dgvClass1)item.Clone();
clone.Number++;
bindingList.Add(clone);
clone = (dgvClass1)clone.Clone();
clone.Number++;
bindingList.Add(clone);
this.dataGridView1.DataSource = bindingList;
this.dataGridView1.Columns[0].Frozen = true;
//this.dataGridView1.Columns[1].ValueType = typeof(int);
}
/// <summary>
/// Add ComboBox column at position 2.
/// </summary>
private void AddComboBox()
{
DataGridViewComboBoxColumn dgvCombo = new DataGridViewComboBoxColumn();
dgvCombo.Name = "Priority";
dgvCombo.Width = 100;
dgvCombo.DataSource = new string[] { "Low", "Medium", "High" };
dgvCombo.DisplayIndex = 2;
this.dataGridView1.Columns.Add(dgvCombo);
for (int rowNr = 0; rowNr < bindingList.Count; rowNr++)
{
var row = this.dataGridView1.Rows[rowNr];
DataGridViewComboBoxCell dgvComboCell = (DataGridViewComboBoxCell)row.Cells["Priority"];
dgvComboCell.Value = bindingList[row.Index].priority;
}
}
/// <summary>
/// Uses class CalendarColumn.
/// https://msdn.microsoft.com/en-us/library/7tas5c80(v=vs.100).aspx
/// </summary>
private void AddCalendarColumn()
{
CalendarColumn col = new CalendarColumn();
col.Name = "Datum";
col.Width = 100;
this.dataGridView1.Columns.Add(col);
////this.dataGridView1.Columns["Datum"].DefaultCellStyle.Format = "yyyy-MM-dd HH:mm"; // "dd/MM/yyyy";
foreach (DataGridViewRow row in this.dataGridView1.Rows)
{
row.Cells["Datum"].Value = bindingList[row.Index].date;
}
}
public void DataGridChanged(object sender, DataGridViewRowEventArgs e)
{
Debug.Print("CollectionChanged");
}
private void RowValidatedEvent(object sender, DataGridViewCellEventArgs e)
{
Debug.Print("RowValidatedEvent");
}
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (this.dataGridView1.Columns[e.ColumnIndex].Name == "Priority")
{
string oldPriority = this.bindingList[e.RowIndex].priority;
string newPriority = this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString();
this.bindingList[e.RowIndex].priority = newPriority;
//this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Style.BackColor = Color.Yellow;
Debug.Print("Priority changed from: " + oldPriority + " to: " + newPriority);
}
else if (this.dataGridView1.Columns[e.ColumnIndex].Name == "Datum")
{
////DateTime oldDate = this.bindingList[e.RowIndex].date;
DateTime newDate;
DateTime.TryParse(this.dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString(), out newDate);
this.bindingList[e.RowIndex].date = newDate;
}
}
/// <summary>
/// Show changes in bindingList.
/// </summary>
private void button2_Click(object sender, EventArgs e)
{
string str = string.Empty;
foreach (var item in this.bindingList)
{
str += item.Name + ", " + item.priority + ", " + item.date + "\n";
}
MessageBox.Show(str);
}
private void buttonDelete_Click(object sender, EventArgs e)
{
if (this.dataGridView1.CurrentRow != null)
{
this.bindingList.RemoveAt(this.dataGridView1.CurrentRow.Index);
}
}
private void buttonAdd_Click(object sender, EventArgs e)
{
var item = new dgvClass1();
bindingList.Add(item);
this.dataGridView1.Rows[this.bindingList.Count - 1].Cells["Priority"].Value = item.priority; // "Medium"
this.dataGridView1.Rows[this.bindingList.Count - 1].Cells["Datum"].Value = item.date;
}
}
}
///////////////////////// And the helper class:
public class dgvClass1 : ICloneable
{
/// <summary>
/// priority is not a propery, so it is not visible in datagrid by default.
/// </summary>
public string priority;
/// <summary>
/// date is not a propery, so it is not visible in datagrid by default.
/// </summary>
public DateTime date;
public int Number { get; set; }
public string Name { get; set; }
public dgvClass1()
{
this.date = DateTime.Now;
this.priority = "Medium";
}
/// <summary>
/// https://msdn.microsoft.com/en-us/library/system.object.memberwiseclone(v=vs.100).aspx
/// </summary>
public object Clone()
{
return (dgvClass1)this.MemberwiseClone();
}
}
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