1).右鍵點選行時選中行,并彈出操作菜單
1). 添加一個快捷菜單contextMenuStrip1;
2). 給dataGridView1的CellMouseDown事件添加處理程式:
private void dataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
//過濾有可能右鍵點選的行标題和空白列頭。
if (e.RowIndex >= 0 && e.ColumnIndex>=0)
{
//若行已是選中狀态就不再進行設定
if (dataGridView1.Rows[e.RowIndex].Selected == false)
{
dataGridView1.ClearSelection();
dataGridView1.Rows[e.RowIndex].Selected = true;
}
//隻選中一行時設定活動單元格
if (dataGridView1.SelectedRows.Count == 1)
dataGridView1.CurrentCell = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];
//彈出操作菜單
contextMenuStrip1.Show(MousePosition.X, MousePosition.Y);
}
}
}
效果圖:
2).複制選中單元格的内容到剪貼闆
Clipboard.SetDataObject(dataGridView1.GetClipboardContent());
3).隻顯示自定義列
dataGridView1.AutoGenerateColumns = false;//必須在代碼中設定
4).顯示圖檔
通常,我們将圖檔路徑儲存在資料庫中,但在dataGridView1中要顯示圖檔,可以進行如下操作:
①.添加一個DataGridViewTextBoxColumn類型的列,Name=Path,DataPropertyName=Pic,Visible=False;
②.添加一個DataGridViewImageColumn類型的列,Name=Pic;
③.dataGridView1控件DataBindingComplete事件處理程式如下:
private void DataGridView1_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
Image image1 = null;
Image image2 = null;
string path = string.Empty;
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
path = @"F:\" + dataGridView1.Rows[i].Cells["Path"].Value;
if (File.Exists(path))
{
image1 = Image.FromFile(path);
image2 = new Bitmap(image1, 120, 120);//重設大小
dataGridView1.Rows[i].Cells["Pic"].Value = image2;
//((DataGridViewImageCell)dataGridView1.Rows[i].Cells["Pic"]).Value = image2;
}
}
}
5).當網格未填充滿控件時,畫線來填充空白區域
/// <summary>
/// 繪制網格填充空白區域
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
DataGridView myDataGridView = (DataGridView)sender;
if (myDataGridView.Rows.Count > 0)
int i = myDataGridView.ColumnHeadersHeight;//标題行高
int j = myDataGridView.Rows.GetRowsHeight(DataGridViewElementStates.Visible); //所有可見行總高
int k = myDataGridView.Height; //控件高度
int l = myDataGridView.Rows.GetLastRow(DataGridViewElementStates.Visible);//最後一行索引
int count = myDataGridView.Columns.Count;//列總數
int width = 0;
//當網格未充滿控件時才畫線
if (i + j < k)
using (Brush gridBrush = new SolidBrush(myDataGridView.GridColor))
{
using (Pen gridLinePen = new Pen(gridBrush))
{
//處理标題列
if (myDataGridView.RowHeadersVisible)
{
width = myDataGridView.RowHeadersWidth;
e.Graphics.DrawLine(gridLinePen, width, i + j, width, k);
}
else
width = 1;
//處理正常列
for (int index = 0; index < count; index++)
if (myDataGridView.Columns[index].Visible)
{
width += myDataGridView.Columns[index].Width;
e.Graphics.DrawLine(gridLinePen, width, i + j, width, k);
}
}
}
6).自定義列寬
手動添加列,再在編輯列界面中逐個設定寬度。注意AutoSizeColumnsMode的值必須為DataGridViewAutoSizeColumnsMode.None,否則自定義寬度不能生效!
7).單元格内容格式化
private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
if (myDataGridView.Columns["ID"].Index == e.ColumnIndex)
if(e.Value != null && !string.IsNullOrEmpty(e.Value.ToString()))
e.Value = "BH" + string.Format("{0:D8}", int.Parse(e.Value.ToString()));
8).打造一個漂亮的DataGridView
//樣式
dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.None;//列寬不自動調整,手工添加列
dataGridView1.RowHeadersWidth = 12;//行标題寬度固定12
dataGridView1.RowHeadersWidthSizeMode = DataGridViewRowHeadersWidthSizeMode.DisableResizing;//不能用滑鼠調整列标頭寬度
dataGridView1.AlternatingRowsDefaultCellStyle.BackColor = Color.LemonChiffon;//奇數行背景色
dataGridView1.BackgroundColor = Color.White;//控件背景色
dataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;//列标題居中顯示
dataGridView1.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;//單元格内容居中顯示
//行為
dataGridView1.AutoGenerateColumns = false;//不自動建立列
dataGridView1.AllowUserToAddRows = false;//不啟用添加
dataGridView1.ReadOnly = true;//不啟用編輯
dataGridView1.AllowUserToDeleteRows = false;//不啟用删除
dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;//單擊單元格選中整行
dataGridView1.MultiSelect = false;//不能多選
9).判斷有無滾動條
//垂直滾動條
if (dataGridView1.Rows.GetRowsHeight(DataGridViewElementStates.None) > dataGridView1.Height)
MessageBox.Show("有");
else
MessageBox.Show("無");
//水準滾動條
if(dataGridView1.Columns.GetColumnsWidth(DataGridViewElementStates.None) > dataGridView1.Width)
10).為什麼列标題總不居中?
已經将列标題預設對齊方式設定為居中:
但實際的效果總是偏左了一點,原因是列可以進行排序,排序标志符号在列标題上占了空間。逐列按下邊設定可去掉:
dataGridView1.Columns[i].SortMode = DataGridViewColumnSortMode.NotSortable;