利用以下代码，通过Label控件，直接为DataGridView添加行统计。
1 /// <summary>
2 /// 添加统计行
3 /// </summary>
4 /// <param name="dataGridView"></param>
5 public void AddLable(DataGridView dataGridView)
6 {
7 Label lblParent, lblChild;
8 DataGridViewColumn column;
9 int height = dataGridView.Height;
10 int width = dataGridView.Columns.GetColumnsWidth(DataGridViewElementStates.None);
11 int scrollbarheight = dataGridView.Columns.GetColumnsWidth(DataGridViewElementStates.None) > dataGridView.Width ? 16 : 0;//水平滚动条高
12 int rowheaderswidth = dataGridView.RowHeadersVisible ? dataGridView.RowHeadersWidth : 0;//行标题宽度
13 int length = rowheaderswidth;
14
15 if (dataGridView.Controls[dataGridView.Name + "____"] != null)
16 dataGridView.Controls.Remove(dataGridView.Controls[dataGridView.Name + "____"]);
17
18 lblParent = new Label();
19 lblParent.Name = dataGridView.Name + "____";
20 lblParent.BackColor = Color.Silver;
21 lblParent.Left = 1;
22 lblParent.Top = height - scrollbarheight - 23 - 1;
23 lblParent.Height = 23;
24 lblParent.Width = width + rowheaderswidth - 1;
25 dataGridView.Controls.Add(lblParent);
26
27 for (int i = 0; i < dataGridView.Columns.Count; i++)
28 {
29 column = dataGridView.Columns[i];
30
31 if (column.Visible)
32 {
33 lblChild = new Label();
34 lblChild.Name = column.Name + "____";
35 lblChild.BackColor = Color.Transparent;
36 lblChild.AutoSize = true;
37 lblChild.Left = length + ((int)column.Width / 2) - 10 + 1;
38 length += column.Width;
39 lblChild.Top = 3;
40 lblParent.Controls.Add(lblChild);
41 }
42 }
43
44 }
运行效果：
获取列数总和，以进行统计：
1 /// <summary>
2 /// 获取列总和
3 /// </summary>
4 /// <param name="dataGridView"></param>
5 /// <param name="columnName"></param>
6 public void SetSUM(DataGridView dataGridView, string columnName)
7 {
8 if (dataGridView.Controls[dataGridView.Name + "____"] != null)
9 {
10 decimal sum = 0;
11
12 for (int i = 0; i < dataGridView.Rows.Count; i++)
13 {
14 try
15 {
16 if (dataGridView.Rows[i].Cells[columnName].Value != null)
17 {
18 //sum += decimal.Parse(dataGridView.Rows[i].Cells[columnName].Value.ToString());
19 sum += 1; //循环统计
20 }
21 }
22 catch { }
23 }
24
25 dataGridView.Controls[dataGridView.Name + "____"].Controls[columnName + "____"].Text = sum.ToString();
26 }
27 }
写入户数统计：
1 /// <summary>
2 /// 写入户数
3 /// </summary>
4 /// <param name="dataGridView"></param>
5 /// <param name="columnName"></param>
6 public void SetHu(DataGridView dataGridView, string columnName)
7 {
8 if (dataGridView.Controls[dataGridView.Name + "____"] != null)
9 {
10
11 dataGridView.Controls[dataGridView.Name + "____"].Controls[columnName + "____"].Text = "户数统计：";
12 }
13 }