解讀C#中對DatagridView的部分常用操作_.Net教程

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dbfC#DataGridView中的常用技巧
只列出技巧部分,后面會有補充
0(最基本的技巧). 獲取某列中的某行(某單元格)中的內容
this.currentposition = this.dataGridView1.BindingContext [this.dataGridView1.DataSource, this.dataGridView1.DataMember].Position;
bookContent = this.database.dataSet.Tables[0].Rows [this.currentposition][21].ToString().Trim();
MessageBox.Show(bookContent);

1、自定義列

//定義列寬
this.dataGridView1.Columns[0].Width = 80;
this.dataGridView1.Columns[1].Width = 80;
this.dataGridView1.Columns[2].Width = 180;
this.dataGridView1.Columns[3].Width = 120;
this.dataGridView1.Columns[4].Width = 120;

Customize Cells and Columns in the Windows Forms DataGridView Control by Extending Their
Behavior and Appearance
Host Controls in Windows Forms DataGridView Cells
繼承 DataGridViewTextBoxCell 類生成新的Cell類，然后再繼承 DataGridViewColumn 生成新的Column類，并指定
CellTemplate為新的Cell類。新生成的Column便可以增加到DataGridView中去。
2、自動適應列寬
Programmatically Resize Cells to Fit Content in the Windows Forms DataGridView Control
Samples：
DataGridView.AutoSizeColumns(
DataGridViewAutoSizeColumnCriteria.HeaderAndDisplayedRows);
DataGridView.AutoSizeColumn(
DataGridViewAutoSizeColumnCriteria.HeaderOnly,
2, false);
DataGridView.AutoSizeRow(
DataGridViewAutoSizeRowCriteria.Columns,
2, false);
DataGridView.AutoSizeRows(
DataGridViewAutoSizeRowCriteria.HeaderAndColumns,
0, dataGridView1.Rows.Count, false);
3、可以綁定并顯示對象
Bind Objects to Windows Forms DataGridView Controls
4、可以改變表格線條風格
Change the Border and Gridline Styles in the Windows Forms DataGridView Control
Samples:
this.dataGridView1.GridColor = Color.BlueViolet;
this.dataGridView1.BorderStyle = BorderStyle.Fixed3D;
this.dataGridView1.CellBorderStyle = DataGridViewCellBorderStyle.None;
this.dataGridView1.RowHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single;
this.dataGridView1.ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single;
5、動態改變列是否顯示，和動態改變列的顯示順序
Change the Order of the Columns in the Windows Forms DataGridView Control
Samples：
customersDataGridView.Columns["CustomerID"].Visible = false;
customersDataGridView.Columns["ContactName"].DisplayIndex = 0;
customersDataGridView.Columns["ContactTitle"].DisplayIndex = 1;
customersDataGridView.Columns["City"].DisplayIndex = 2;
customersDataGridView.Columns["Country"].DisplayIndex = 3;
customersDataGridView.Columns["CompanyName"].DisplayIndex = 4;

6、可以在列中顯示圖像
Display Images in Cells of the Windows Forms DataGridView Control
Samples：
Icon treeIcon = new Icon(this.GetType(), "tree.ico");
DataGridViewImageColumn iconColumn = new DataGridViewImageColumn ();
iconColumn.Image = treeIcon.ToBitmap();
iconColumn.Name = "Tree";
iconColumn.HeaderText = "Nice tree";
dataGridView1.Columns.Insert(2, iconColumn);

7、格式化顯示內容:
Format Data in the Windows Forms DataGridView Control
Samples:
this.dataGridView1.Columns["UnitPrice"].DefaultCellStyle.Format = "c";
this.dataGridView1.Columns["ShipDate"].DefaultCellStyle.Format = "d";
this.dataGridView1.DefaultCellStyle.NullValue = "no entry";
this.dataGridView1.DefaultCellStyle.WrapMode = DataGridViewWrapMode.Wrap;
this.dataGridView1.Columns["CustomerName"].DefaultCellStyle.Alignment =
DataGridViewContentAlignment.MiddleRight;

8、在拖動列的滾動條時可以將指定的列凍結
Freeze Columns in the Windows Forms DataGridView Control
Samples：將指定列及以前的列固定不動
this.dataGridView1.Columns["AddToCartButton"].Frozen = true;

9、獲取選擇的單元格,行,列
Get the Selected Cells, Rows, and Columns in the Windows Forms DataGridView Control
Samples:
見msdn。

10、顯示錄入時出現的錯誤信息
Handle Errors that Occur During Data Entry in the Windows Forms DataGridView Control
Samples：
private void dataGridView1_DataError(object sender,
DataGridViewDataErrorEventArgs e)
{
// If the data source raises an exception when a cell value is
// commited, display an error message.
if (e.Exception != null &&
e.Context == DataGridViewDataErrorContext.Commit)
{
MessageBox.Show("CustomerID value must be unique.");
}
}

11、大數據量顯示采用Virtual Mode
Implement Virtual Mode in the Windows Forms DataGridView Control

12、設置指定的列只讀
Make Columns in the Windows Forms DataGridView Control Read-Only
Samples：
dataGridView1.Columns["CompanyName"].ReadOnly = true;

13、移去自動生成的列
Remove Autogenerated Columns from a Windows Forms DataGridView Control
Sample:
dataGridView1.AutoGenerateColumns = true;
dataGridView1.DataSource = customerDataSet;
dataGridView1.Columns.Remove ("Fax");
或：
dataGridView1.Columns["CustomerID"].Visible = false;

14、自定義選擇模式
Set the Selection Mode of the Windows Forms DataGridView Control
Sample：
this.dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
this.dataGridView1.MultiSelect = false;

15、自定義設定光標進入單元格是否編輯模式（編輯模式）
Specify the Edit Mode for the Windows Forms DataGridView Control
this.dataGridView1.EditMode = DataGridViewEditMode.EditOnEnter;

16、新行指定默認值
Specify Default Values for New Rows in the Windows Forms DataGridView Control
Sample：
private void dataGridView1_DefaultValuesNeeded(object sender, System.Windows.Forms.DataGridViewRowEventArgs e)
{
e.Row.Cells["Region"].Value = "WA";
e.Row.Cells["City"].Value = "Redmond";
e.Row.Cells["PostalCode"].Value = "98052-6399";
e.Row.Cells["Region"].Value = "NA";
e.Row.Cells["Country"].Value = "USA";
e.Row.Cells["CustomerID"].Value = NewCustomerId();
}

17、數據驗證

Validate Data in the Windows Forms DataGridView Control
Samples：
private void dataGridView1_CellValidating(object sender,
DataGridViewCellValidatingEventArgs e)
{
// Validate the CompanyName entry by disallowing empty strings.
if (dataGridView1.Columns[e.ColumnIndex].Name == "CompanyName")
{
if (e.FormattedValue.ToString() == String.Empty)
{
dataGridView1.Rows[e.RowIndex].ErrorText =
"Company Name must not be empty";
e.Cancel = true;
}
}
}

18、數據提交到dataset中
DataSet ds = new DataSet("MyDataSet");
ds.Tables[biaom.Trim()].Rows.Clear();
try
{
for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
{
DataTable dt = ds.Tables[biaom.Trim()];
DataRow myrow = ds.Tables[biaom.Trim()].NewRow();
for (int j = 0; j < dataGridView1.Columns.Count; j++)
{
myrow[j] = Convert.ToString(dataGridView1.Rows[i].Cells[j].Value);
}
ds.Tables[biaom.Trim()].Rows.Add(myrow);
}
}
catch (Exception)
{