DataGridView的一些技巧

DataGridView的一些技巧
最近一直跟DataGridView打交道，突然觉得很多技巧性的东西很模糊，经过最近的个人实验操作和从网上查到的资料
把对DataGridView操作的一些技巧总结和借鉴了一下，总结如下：

1
、自定义列
Customize Cells and Columns
in
the Windows Forms DataGridView Control
by
Extending Their
Behavior and Appearance
Host Controls
in
Windows Forms DataGridView Cells
继承 DataGridViewTextBoxCell 类生成新的Cell类，然后再继承 DataGridViewColumn 生成新的Column类，并指定
CellTemplate为新的Cell类。新生成的Column便可以增加到DataGridView中去。

2
、自动适应列宽
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
、可以绑定并显示对象
Bind Objects to Windows Forms DataGridView Controls

4
、可以改变表格线条风格
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
、动态改变列是否显示，和动态改变列的显示顺序
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
、可以在列中显示图像
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
、格式化显示内容:
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
、在拖动列的滚动条时可以将指定的列冻结
Freeze Columns
in
the Windows Forms DataGridView Control
Samples：将指定列及以前的列固定不动

this
.dataGridView1.Columns[
"
AddToCartButton
"
].Frozen
=

true
;

9
、获取选择的单元格,行,列
Get the Selected Cells, Rows, and Columns
in
the Windows Forms DataGridView Control
Samples:
见msdn。

10
、显示录入时出现的错误信息
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
、大数据量显示采用Virtual Mode
Implement Virtual Mode
in
the Windows Forms DataGridView Control

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

true
;

13
、移去自动生成的列
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
、自定义选择模式
Set the Selection Mode of the Windows Forms DataGridView Control
Sample：

this
.dataGridView1.SelectionMode
=
DataGridViewSelectionMode.FullRowSelect;

this
.dataGridView1.MultiSelect
=

false
;

15
、自定义设定光标进入单元格是否编辑模式（编辑模式）
Specify the Edit Mode
for
the Windows Forms DataGridView Control

this
.dataGridView1.EditMode
=
DataGridViewEditMode.EditOnEnter;

16
、新行指定默认值
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
、数据验证
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
、数据提交到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)
{

MessageBox.Show(
"
输入类型错误！
"
);

return
;
}