问题
I have a problem. My code contains DataGridView and UnBound CheckBoxColumn. My dialog should be for choose rooms from list. For second time you want to see what are you chose in first time.
Code:
ChooseGroupRoomDialog.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using BE; // My namespace
using ListExtensions; // My namespace
namespace PLForms
{
public partial class ChooseGroupRoomsDialog : Form
{
public List<Room> Value
{
get
{
List<Room> retList = new List<Room>();
for (int i = 0; i < table.RowCount; i++)
{
DataGridViewCheckBoxCell cell = (DataGridViewCheckBoxCell)table[chooseColumnIndex, i];
if (cell.Value != null && (bool)cell.Value)
retList.Add((Room)table.Rows[i].DataBoundItem);
}
return retList;
}
set
{
List<Room> data = (List<Room>)(table.DataSource);
foreach (Room room in value)
{
int index = data.FindIndex(roomA => roomA.Id == room.Id);
if (index != -1)
{
table[index, chooseColumnIndex].Value = true; //Not working!!
}
}
}
}
private int chooseColumnIndex;
public ChooseGroupRoomsDialog(List<Room> dataSource)
{
InitializeComponent();
table.DataSource = dataSource.ToList();
DialogResult = DialogResult.Cancel;
foreach (DataGridViewColumn col in table.Columns)
col.ReadOnly = true;
chooseColumnIndex = chooseColumn.Index;
chooseColumn.ReadOnly = false;
}
private void okButton_Click(object sender, EventArgs e)
{
DialogResult = DialogResult.OK;
this.Close();
}
private void cancelButton_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
ChooseGroupRoomDialog.Designer.cs
namespace PLForms
{
partial class ChooseGroupRoomsDialog
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle1 = new System.Windows.Forms.DataGridViewCellStyle();
this.table = new System.Windows.Forms.DataGridView();
this.roomBindingSource = new System.Windows.Forms.BindingSource(this.components);
this.okButton = new System.Windows.Forms.Button();
this.cancelButton = new System.Windows.Forms.Button();
this.chooseColumn = new System.Windows.Forms.DataGridViewCheckBoxColumn();
this.idDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.numberOfBedsDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.typeOfRoomStringDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.viewingSeaDataGridViewCheckBoxColumn = new System.Windows.Forms.DataGridViewCheckBoxColumn();
this.costDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.jakuziDataGridViewCheckBoxColumn = new System.Windows.Forms.DataGridViewCheckBoxColumn();
this.numberOfWindowsDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.airConditionedDataGridViewCheckBoxColumn = new System.Windows.Forms.DataGridViewCheckBoxColumn();
this.cleaningDateDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
this.landScapeDataGridViewTextBoxColumn = new System.Windows.Forms.DataGridViewTextBoxColumn();
((System.ComponentModel.ISupportInitialize)(this.table)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.roomBindingSource)).BeginInit();
this.SuspendLayout();
//
// table
//
this.table.AllowUserToAddRows = false;
this.table.AllowUserToDeleteRows = false;
this.table.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
| System.Windows.Forms.AnchorStyles.Left)
| System.Windows.Forms.AnchorStyles.Right)));
this.table.AutoGenerateColumns = false;
this.table.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.table.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
this.chooseColumn,
this.idDataGridViewTextBoxColumn,
this.numberOfBedsDataGridViewTextBoxColumn,
this.typeOfRoomStringDataGridViewTextBoxColumn,
this.viewingSeaDataGridViewCheckBoxColumn,
this.costDataGridViewTextBoxColumn,
this.jakuziDataGridViewCheckBoxColumn,
this.numberOfWindowsDataGridViewTextBoxColumn,
this.airConditionedDataGridViewCheckBoxColumn,
this.cleaningDateDataGridViewTextBoxColumn,
this.landScapeDataGridViewTextBoxColumn});
this.table.DataSource = this.roomBindingSource;
dataGridViewCellStyle1.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleLeft;
dataGridViewCellStyle1.BackColor = System.Drawing.SystemColors.Window;
dataGridViewCellStyle1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(177)));
dataGridViewCellStyle1.ForeColor = System.Drawing.SystemColors.ControlText;
dataGridViewCellStyle1.SelectionBackColor = System.Drawing.SystemColors.GradientInactiveCaption;
dataGridViewCellStyle1.SelectionForeColor = System.Drawing.SystemColors.ControlText;
dataGridViewCellStyle1.WrapMode = System.Windows.Forms.DataGridViewTriState.False;
this.table.DefaultCellStyle = dataGridViewCellStyle1;
this.table.Location = new System.Drawing.Point(129, 12);
this.table.MultiSelect = false;
this.table.Name = "table";
this.table.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect;
this.table.Size = new System.Drawing.Size(1047, 372);
this.table.TabIndex = 1;
//
// roomBindingSource
//
this.roomBindingSource.DataSource = typeof(BE.Room);
//
// okButton
//
this.okButton.Location = new System.Drawing.Point(12, 12);
this.okButton.Name = "okButton";
this.okButton.Size = new System.Drawing.Size(111, 44);
this.okButton.TabIndex = 2;
this.okButton.Text = "אישור";
this.okButton.UseVisualStyleBackColor = true;
this.okButton.Click += new System.EventHandler(this.okButton_Click);
//
// cancelButton
//
this.cancelButton.DialogResult = System.Windows.Forms.DialogResult.Cancel;
this.cancelButton.Location = new System.Drawing.Point(12, 62);
this.cancelButton.Name = "cancelButton";
this.cancelButton.Size = new System.Drawing.Size(111, 44);
this.cancelButton.TabIndex = 2;
this.cancelButton.Text = "ביטול";
this.cancelButton.UseVisualStyleBackColor = true;
this.cancelButton.Click += new System.EventHandler(this.cancelButton_Click);
//
// chooseColumn
//
this.chooseColumn.HeaderText = "בחירה";
this.chooseColumn.Name = "chooseColumn";
this.chooseColumn.Width = 70;
//
// idDataGridViewTextBoxColumn
//
this.idDataGridViewTextBoxColumn.DataPropertyName = "Id";
this.idDataGridViewTextBoxColumn.HeaderText = "מספר זיהוי";
this.idDataGridViewTextBoxColumn.Name = "idDataGridViewTextBoxColumn";
//
// numberOfBedsDataGridViewTextBoxColumn
//
this.numberOfBedsDataGridViewTextBoxColumn.DataPropertyName = "NumberOfBeds";
this.numberOfBedsDataGridViewTextBoxColumn.HeaderText = "מספר מיטות";
this.numberOfBedsDataGridViewTextBoxColumn.Name = "numberOfBedsDataGridViewTextBoxColumn";
//
// typeOfRoomStringDataGridViewTextBoxColumn
//
this.typeOfRoomStringDataGridViewTextBoxColumn.DataPropertyName = "TypeOfRoomString";
this.typeOfRoomStringDataGridViewTextBoxColumn.HeaderText = "סוג חדר";
this.typeOfRoomStringDataGridViewTextBoxColumn.Name = "typeOfRoomStringDataGridViewTextBoxColumn";
this.typeOfRoomStringDataGridViewTextBoxColumn.ReadOnly = true;
//
// viewingSeaDataGridViewCheckBoxColumn
//
this.viewingSeaDataGridViewCheckBoxColumn.DataPropertyName = "ViewingSea";
this.viewingSeaDataGridViewCheckBoxColumn.HeaderText = "נוף לים";
this.viewingSeaDataGridViewCheckBoxColumn.Name = "viewingSeaDataGridViewCheckBoxColumn";
this.viewingSeaDataGridViewCheckBoxColumn.Width = 70;
//
// costDataGridViewTextBoxColumn
//
this.costDataGridViewTextBoxColumn.DataPropertyName = "Cost";
this.costDataGridViewTextBoxColumn.HeaderText = "מחיר";
this.costDataGridViewTextBoxColumn.Name = "costDataGridViewTextBoxColumn";
this.costDataGridViewTextBoxColumn.ReadOnly = true;
//
// jakuziDataGridViewCheckBoxColumn
//
this.jakuziDataGridViewCheckBoxColumn.DataPropertyName = "Jakuzi";
this.jakuziDataGridViewCheckBoxColumn.HeaderText = "ג\'קוזי";
this.jakuziDataGridViewCheckBoxColumn.Name = "jakuziDataGridViewCheckBoxColumn";
this.jakuziDataGridViewCheckBoxColumn.Width = 70;
//
// numberOfWindowsDataGridViewTextBoxColumn
//
this.numberOfWindowsDataGridViewTextBoxColumn.DataPropertyName = "NumberOfWindows";
this.numberOfWindowsDataGridViewTextBoxColumn.HeaderText = "מספר חלונות";
this.numberOfWindowsDataGridViewTextBoxColumn.Name = "numberOfWindowsDataGridViewTextBoxColumn";
//
// airConditionedDataGridViewCheckBoxColumn
//
this.airConditionedDataGridViewCheckBoxColumn.DataPropertyName = "AirConditioned";
this.airConditionedDataGridViewCheckBoxColumn.HeaderText = "מיזוג אוויר";
this.airConditionedDataGridViewCheckBoxColumn.Name = "airConditionedDataGridViewCheckBoxColumn";
this.airConditionedDataGridViewCheckBoxColumn.Width = 80;
//
// cleaningDateDataGridViewTextBoxColumn
//
this.cleaningDateDataGridViewTextBoxColumn.DataPropertyName = "CleaningDate";
this.cleaningDateDataGridViewTextBoxColumn.HeaderText = "תאריך ניקיון";
this.cleaningDateDataGridViewTextBoxColumn.Name = "cleaningDateDataGridViewTextBoxColumn";
//
// landScapeDataGridViewTextBoxColumn
//
this.landScapeDataGridViewTextBoxColumn.DataPropertyName = "LandScape";
this.landScapeDataGridViewTextBoxColumn.HeaderText = "איכות נוף";
this.landScapeDataGridViewTextBoxColumn.Name = "landScapeDataGridViewTextBoxColumn";
this.landScapeDataGridViewTextBoxColumn.Width = 90;
//
// ChooseGroupRoomsDialog
//
this.AcceptButton = this.okButton;
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.CancelButton = this.cancelButton;
this.ClientSize = new System.Drawing.Size(1190, 399);
this.Controls.Add(this.cancelButton);
this.Controls.Add(this.okButton);
this.Controls.Add(this.table);
this.Name = "ChooseGroupRoomsDialog";
this.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
this.RightToLeftLayout = true;
this.Text = "בחר חדרים";
((System.ComponentModel.ISupportInitialize)(this.table)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.roomBindingSource)).EndInit();
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.BindingSource roomBindingSource;
private System.Windows.Forms.DataGridView table;
private System.Windows.Forms.Button okButton;
private System.Windows.Forms.Button cancelButton;
private System.Windows.Forms.DataGridViewCheckBoxColumn chooseColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn idDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn numberOfBedsDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn typeOfRoomStringDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewCheckBoxColumn viewingSeaDataGridViewCheckBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn costDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewCheckBoxColumn jakuziDataGridViewCheckBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn numberOfWindowsDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewCheckBoxColumn airConditionedDataGridViewCheckBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn cleaningDateDataGridViewTextBoxColumn;
private System.Windows.Forms.DataGridViewTextBoxColumn landScapeDataGridViewTextBoxColumn;
}
}
回答1:
Something weird is happening that I can't pin down. When I set a break point on your //Not working!! line, passing in an artificial list of two rooms out of five that I'm populating with, the watch window shows the type of table[index, chooseColumn.Index] as a DataGridViewTextBoxCell the first time and a DataGridViewCheckBoxCell the second, and I'm not even sure how that's possible.
EDIT: I just figured out how it's possible. You have the column and row indices backward. Your non-working line should be:
table[chooseColumn.Index, index].Value = true; //Working!!
EDIT AGAIN: OK, my previous conjectures and link to this answer were also necessary. You have to fix the index order AND set the cell value to true in the DataBindingComplete handler:
List<Room> _value;
public List<Room> Value
{
get
{
List<Room> retList = new List<Room>();
for (int i = 0; i < table.RowCount; i++)
{
DataGridViewCheckBoxCell cell = (DataGridViewCheckBoxCell)table[chooseColumn.Index, i];
if (cell.Value != null && (bool)cell.Value)
retList.Add((Room)table.Rows[i].DataBoundItem);
}
return retList;
}
set
{
_value = value;
}
}
private void table_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
if (_value == null) return;
List<Room> data = (List<Room>)(table.DataSource);
foreach (Room room in _value)
{
int index = data.FindIndex(roomA => roomA.Id == room.Id);
if (index != -1)
{
table[chooseColumn.Index, index].Value = true; //Working!!
}
}
}
来源：https://stackoverflow.com/questions/8895797/unbound-datagridviewcheckboxcell-set-value