通用类实现DataGridView自动添加合计行

1using System;
2using System.Collections.Generic;
3using System.Text;
4using System.Windows.Forms;
5using System.Data;
6using System.Drawing;
7using System.ComponentModel;
8
9namespace OtherTools
10{
11 class DataGridViewAddSumRow
12 {
13 private DataGridView dgv = null;
14 private DataTable dt = null;
15 public DataGridViewAddSumRow()
16 {
17 }
18 /**//// <summary>
19 /// 设置表格的数据源
20 /// </summary>
21 public DataTable dataTableName
22 {
23 set
24 {
25 this.dt = value;
26 }
27 }
28 /**//// <summary>
29 ///传递表格的名称
30 /// </summary>
31 public DataGridView DgvName
32 {
33 set
34 {
35 dgv = value;
36 }
37 }
38 /**//// <summary>
39 /// 开始添加合计行
40 /// </summary>
41 public void begin()
42 {
43 initDgv();
44 }
45 private void initDgv()
46 {
47 if (dgv != null)
48 {
49
50 this.dgv.DataSourceChanged += new EventHandler(dataGridView_DataSourceChanged);
51 this.dgv.ColumnHeaderMouseClick += new DataGridViewCellMouseEventHandler(dataGridView_ColumnHeaderMouseClick);
52 this.dgv.CellValueChanged += new DataGridViewCellEventHandler(dataGridView_CellValueChanged);
53 this.dgv.AllowUserToAddRows = false;
54 dgv.DataSource = dt;
55 }
56 }
57 /**//// <summary>
58 /// 计算合计算
59 /// </summary>
60 /// <param name="dgv">要计算的DataGridView</param>
61 private void SumDataGridView(DataGridView dgv)
62 {
63 if (dgv.DataSource == null) return;
64 //DataTable dt = (DataTable)dgv.DataSource;
65 if (dt.Rows.Count < 1) return;
66 decimal[] tal = new decimal[dt.Columns.Count];
67
68 DataRow ndr = dt.NewRow();
69
70 string talc = "";
71
72 int number = 1;
73 foreach (DataRow dr in dt.Rows)
74 {
75 dr["@xu.Hao"] = number++;
76 int n = 0;
77 foreach (DataColumn dc in dt.Columns)
78 {
79
80
81 if (talc == "" && dc.DataType.Name.ToUpper().IndexOf("STRING") >= 0)
82 { talc = dc.ColumnName; }
83
84
85 if (dc.DataType.IsValueType)
86 {
87 string hej = dr[dc.ColumnName].ToString();
88 try
89 {
90 if (hej != string.Empty) tal[n] += decimal.Parse(hej);
91 }
92 catch (Exception) { }
93 //if (hej != string.Empty) tal[n] += decimal.Parse(hej);
94 }
95
96
97 n++;
98 }
99 }
100
101 ndr.BeginEdit();
102 for (int i = 0; i < dt.Columns.Count; i++)
103 {
104 if (tal[i] != 0)
105 ndr[i] = tal[i];
106 }
107 ndr["@xu.Hao"] = ((int)(dt.Rows.Count + 1)).ToString();
108 if (talc != "") ndr[talc] = "合计";
109 ndr.EndEdit();
110 dt.Rows.Add(ndr);
111
112 dgv.Rows[dgv.Rows.Count - 1].DefaultCellStyle.BackColor = Color.FromArgb(255, 222, 210);
113 dgv.Rows[dgv.Rows.Count - 1].ReadOnly = true;
114
115 if (dgv.Tag == null)
116 {
117 foreach (DataGridViewColumn dgvc in dgv.Columns)
118 {
119 dgvc.SortMode = DataGridViewColumnSortMode.Programmatic;
120 }
121 }
122 dgv.Tag = ndr;
123 }
124 private void dataGridView_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
125 {
126 DataGridView sortDgv = (DataGridView)sender;
127 int fx = 0;
128 if (sortDgv.AccessibleDescription == null)
129 {
130 fx = 1;
131 }
132 else
133 {
134 fx = int.Parse(sortDgv.AccessibleDescription);
135 fx = (fx == 0 ? 1 : 0);
136 }
137 sortDgv.AccessibleDescription = fx.ToString();
138 if (sortDgv.Columns[e.ColumnIndex].Name == "@xu.Hao") return;
139 DataGridViewColumn nCol = sortDgv.Columns[e.ColumnIndex];
140
141 if (nCol.DataPropertyName == string.Empty) return;
142
143 if (nCol != null)
144 {
145 sortDgv.Sort(nCol, fx == 0 ? ListSortDirection.Ascending : ListSortDirection.Descending);
146
147 }
148 //--
149 DataRow dr = (DataRow)sortDgv.Tag;
150 DataTable dt = (DataTable)sortDgv.DataSource;
151 DataRow ndr = dt.NewRow();
152 ndr.BeginEdit();
153 for (int i = 0; i < dt.Columns.Count; i++)
154 {
155 ndr[i] = dr[i];
156 }
157 dt.Rows.Remove(dr);
158
159
160 //if (e.ColumnIndex != 0)
161 {
162 int n = 1;
163 for (int i = 0; i < sortDgv.Rows.Count; i++)
164 {
165 DataGridViewRow dgRow = sortDgv.Rows[i];
166 DataRowView drv = (DataRowView)dgRow.DataBoundItem;
167 DataRow tdr = drv.Row;
168 tdr.BeginEdit();
169 tdr["@xu.Hao"] = n;
170 n++;
171 tdr.EndEdit();
172
173 }
174 sortDgv.Refresh();
175 sortDgv.RefreshEdit();
176
177 }
178 ndr["@xu.Hao"] = ((int)(dt.Rows.Count + 1)).ToString();
179 ndr.EndEdit();
180 dt.Rows.Add(ndr);
181 sortDgv.Tag = ndr;
182
183 //--
184 sortDgv.Sort(sortDgv.Columns["@xu.Hao"], ListSortDirection.Ascending);
185 sortDgv.Columns["@xu.Hao"].HeaderCell.SortGlyphDirection = SortOrder.None;
186 nCol.HeaderCell.SortGlyphDirection = fx == 0 ? SortOrder.Ascending : SortOrder.Descending;
187 sortDgv.Rows[sortDgv.Rows.Count - 1].DefaultCellStyle.BackColor = Color.FromArgb(255, 255, 210);
188
189 }
190 private void dataGridView_DataSourceChanged(object sender, EventArgs e)
191 {
192 DataGridView dgv = (DataGridView)sender;
193 //DataTable dt = (DataTable)dgv.DataSource;
194 if (dt == null) return;
195 decimal[] tal = new decimal[dt.Columns.Count];
196 if (dt.Columns.IndexOf("@xu.Hao") < 0)
197 {
198 DataColumn dc = new DataColumn("@xu.Hao", System.Type.GetType("System.Int32"));
199 dt.Columns.Add(dc);
200 dgv.Columns["@xu.Hao"].DisplayIndex = 0;
201 dgv.Columns["@xu.Hao"].HeaderText = "序号";
202
203 dgv.Columns["@xu.Hao"].SortMode = DataGridViewColumnSortMode.Programmatic;
204 dgv.AutoResizeColumn(dgv.Columns["@xu.Hao"].Index);
205
206 dgv.Columns["@xu.Hao"].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
207 dgv.Columns["@xu.Hao"].Visible = true;
208 }
209 SumDataGridView(dgv);
210 }
211 private void dataGridView_CellValueChanged(object sender, DataGridViewCellEventArgs e)
212 {
213
214 DataGridView dgv = (DataGridView)sender;
215 if (dgv.Tag == null || e.RowIndex < 0 || e.RowIndex == dgv.Rows.Count - 1) return;
216
217 string col = dgv.Columns[e.ColumnIndex].DataPropertyName;
218 if (col == string.Empty) return;
219 if (((DataRowView)dgv.Rows[e.RowIndex].DataBoundItem).Row.Table.Columns[col].DataType.IsValueType)
220 {
221 decimal tal = 0;
222 foreach (DataGridViewRow dgvr in dgv.Rows)
223 {
224 if (dgvr.Index != dgv.Rows.Count - 1)
225 {
226 string hej = dgvr.Cells[e.ColumnIndex].Value.ToString();
227 if (hej != string.Empty) tal += decimal.Parse(hej);
228 }
229 }
230 if (tal == 0)
231 dgv[e.ColumnIndex, dgv.Rows.Count - 1].Value = DBNull.Value;
232 else
233 dgv[e.ColumnIndex, dgv.Rows.Count - 1].Value = tal;
234 }
235 }
236
237 }
238}
239

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