C# DataGridView Helper

100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Windows.Forms;
 
namespace ZB.QueueSys.Common
{
    public class DataGridViewHelper
    {
        //定义一个用于保存静态变量的实例
        private static DataGridViewHelper instance = null;
        //定义一个保证线程同步的标识
        private static readonly object locker = new object();
        //构造函数为私有，使外界不能创建该类的实例
        private DataGridViewHelper() { }
        public static DataGridViewHelper Instance
        {
            get
            {
                if (instance == null)
                {
                    lock (locker)
                    {
                        if (instance == null) instance = new DataGridViewHelper();
                    }
                }
                return instance;
            }
        }
 
        public TModel GetCurrentRowModelObj<TModel>(DataGridView dgv)
        {
            return (TModel)dgv.CurrentRow.DataBoundItem;
        }
 
        public List<DataGridViewRow> GetSelectRowByColName(DataGridView dgv, string colName)
        {
            if (dgv.Rows.Count == 0) return null;
            var checkedRows = from DataGridViewRow row in dgv.Rows
                              where (bool)row.Cells[colName].Value//(bool)row.Cells["ColSelect"].Value
                              select row;
            List<DataGridViewRow> temp = checkedRows as List<DataGridViewRow>;
            return temp;
        }
 
        public DgvSortHelper<T> GetSorDataSource<T>(List<T> list)
        {
            DgvSortHelper<T> temps = new DgvSortHelper<T>();
            foreach (T item in list)
            {
                temps.Add(item);
            }
            return temps;
        }
 
        public void SelectAllDgv(DataGridView dgv, string cellName, bool isChecked)
        {
            if (dgv.Rows.Count == 0) return;
 
            dgv.ClearSelection();
            int count = dgv.Rows.Count;
            for (int i = 0; i < count; i++)
            {
                dgv.Rows[i].Cells[cellName].Value = isChecked;
            }
            dgv.RefreshEdit();
        }
 
        public void SetDgvRowColor(DataGridView dgv)
        {
            dgv.AlternatingRowsDefaultCellStyle.BackColor = Color.FromArgb(204, 224, 233);
        }
 
        public void SetDgvRowColor(DataGridView dgv, Color color)
        {
            dgv.AlternatingRowsDefaultCellStyle.BackColor = color;
            dgv.AutoGenerateColumns = false;
        }
 
        public void SetDgvStyle(DataGridView dgv, Color color)
        {
            dgv.AlternatingRowsDefaultCellStyle.BackColor = color;
            dgv.AutoGenerateColumns = false;
        }
 
        /// <summary>
        /// 重绘DataGridView
        /// </summary>
        /// <param name="dgv"></param>
        /// <param name="e"></param>
        public void PaintDgv(DataGridView dgv, DataGridViewRowPostPaintEventArgs e)
        {
            try
            {
                SolidBrush b = new SolidBrush(dgv.RowHeadersDefaultCellStyle.ForeColor);
                e.Graphics.DrawString((e.RowIndex + 1).ToString(System.Globalization.CultureInfo.CurrentUICulture),
                    dgv.DefaultCellStyle.Font, b, e.RowBounds.Location.X + 5, e.RowBounds.Location.Y + 4);
            }
            catch { return; }
        }
 
    }
 
    #region DgvSortHelper
    public class DgvSortHelper<T> : BindingList<T>
    {
        private bool isSortedCore = true;
        private ListSortDirection sortDirectionCore = ListSortDirection.Ascending;
        private PropertyDescriptor sortPropertyCore = null;
        private string defaultSortItem;
 
        public DgvSortHelper() : base() { }
 
        public DgvSortHelper(IList<T> list) : base(list) { }
 
        protected override bool SupportsSortingCore
        {
            get { return true; }
        }
 
        protected override bool SupportsSearchingCore
        {
            get { return true; }
        }
 
        protected override bool IsSortedCore
        {
            get { return isSortedCore; }
        }
 
        protected override ListSortDirection SortDirectionCore
        {
            get { return sortDirectionCore; }
        }
 
        protected override PropertyDescriptor SortPropertyCore
        {
            get { return sortPropertyCore; }
        }
 
        protected override int FindCore(PropertyDescriptor prop, object key)
        {
            for (int i = 0; i < this.Count; i++)
            {
                if (Equals(prop.GetValue(this[i]), key)) return i;
            }
            return -1;
        }
 
        protected override void ApplySortCore(PropertyDescriptor prop, ListSortDirection direction)
        {
            isSortedCore = true;
            sortPropertyCore = prop;
            sortDirectionCore = direction;
            Sort();
        }
 
        protected override void RemoveSortCore()
        {
            if (isSortedCore)
            {
                isSortedCore = false;
                sortPropertyCore = null;
                sortDirectionCore = ListSortDirection.Ascending;
                Sort();
            }
        }
 
        public string DefaultSortItem
        {
            get { return defaultSortItem; }
            set
            {
                if (defaultSortItem != value)
                {
                    defaultSortItem = value;
                    Sort();
                }
            }
        }
 
        private void Sort()
        {
            List<T> list = (this.Items as List<T>);
            list.Sort(CompareCore);
            ResetBindings();
        }
 
        private int CompareCore(T o1, T o2)
        {
            int ret = 0;
            if (SortPropertyCore != null)
            {
                ret = CompareValue(SortPropertyCore.GetValue(o1), SortPropertyCore.GetValue(o2), SortPropertyCore.PropertyType);
            }
            if (ret == 0 && DefaultSortItem != null)
            {
                PropertyInfo property = typeof(T).GetProperty(DefaultSortItem, BindingFlags.Public | BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.IgnoreCase, null, null, new Type[0], null);
                if (property != null)
                {
                    ret = CompareValue(property.GetValue(o1, null), property.GetValue(o2, null), property.PropertyType);
                }
            }
            if (SortDirectionCore == ListSortDirection.Descending) ret = -ret;
            return ret;
        }
 
        private static int CompareValue(object o1, object o2, Type type)
        {
            if (o1 == null) return o2 == null ? 0 : -1;
            else if (o2 == null) return 1;
            else if (type.IsPrimitive || type.IsEnum) return Convert.ToDouble(o1).CompareTo(Convert.ToDouble(o2));
            else if (type == typeof(DateTime)) return Convert.ToDateTime(o1).CompareTo(o2);
            else return String.Compare(o1.ToString().Trim(), o2.ToString().Trim());
        }
    }
    #endregion
 
}