http://www.cnblogs.com/liye/archive/2010/09/29/1838709.html
1.右鍵點擊行時選中行,並彈出操作菜單
1). 添加一個快捷菜單contextMenuStrip1;
2). 給dataGridView1的CellMouseDown事件添加處理程序:
private voidDataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
if (e.RowIndex >= 0)
{
//若行已是選中狀態就不再進行設置
if(dataGridView1.Rows[e.RowIndex].Selected == false)
{
dataGridView1.ClearSelection();
dataGridView1.Rows[e.RowIndex].Selected= true;
}
//只選中一行時設置活動單元格
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).複製選中單元格的內容到剪貼板
Clipboard.SetDataObject(dataGridView1.GetClipboardContent());
3).只顯示自定義列
dataGridView1.AutoGenerateColumns= false; //必須在代碼中設置
4).顯示圖片
通常,我們將圖片路徑保存在數據庫中,但在dataGridView1中要顯示圖片,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事件處理程序如下:
private voidDataGridView1_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>
/// 繪製網格填充空白區域
/// </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;//標題行高
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))
{
//處理標題列
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置寬度。注意AutoSizeColumnsMode的值必須爲DataGridViewAutoSizeColumnsMode.None,否則自定義寬度不能生效!
7).單元格內容格式化
private voiddataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgse)
{
DataGridView myDataGridView = (DataGridView)sender;
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;//行標題寬度固定12
dataGridView1.RowHeadersWidthSizeMode =DataGridViewRowHeadersWidthSizeMode.DisableResizing;//不能用鼠標調整列標頭寬度
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;//列標題居中顯示
dataGridView1.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;//單元格內容居中顯示
//行爲
dataGridView1.AutoGenerateColumns = false;//不自動創建列
dataGridView1.AllowUserToAddRows = false;//不啓用添加
dataGridView1.ReadOnly = true;//不啓用編輯
dataGridView1.AllowUserToDeleteRows = false;//不啓用刪除
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");
//水平滾動條
if(dataGridView1.Columns.GetColumnsWidth(DataGridViewElementStates.None) >dataGridView1.Width)
MessageBox.Show("有");
else
MessageBox.Show("無");
10).爲什麼列標題總不居中?
已經將列標題默認對齊方式設置爲居中:
dataGridView1.ColumnHeadersDefaultCellStyle.Alignment= DataGridViewContentAlignment.MiddleCenter;//列標題居中顯示
但實際的效果總是偏左了一點,原因是列可以進行排序,排序標誌符號在列標題上佔了空間。逐列按下邊設置可去掉:
dataGridView1.Columns[i].SortMode= DataGridViewColumnSortMode.NotSortable;