DataGridView BindingSource BindNavigator
代码
private
void
button1_Click(
object
sender, EventArgs e)
{
bindingNavigator1.BindingSource
=
bindingSource1;
LoadData();
}
private
void
LoadData()
{
//
The xml to bind to.
string
xml
=
@"
<US><states>
"
+
@"
<state><name>Washington</name><capital>Olympia</capital></state>
"
+
@"
<state><name>Oregon</name><capital>Salem</capital></state>
"
+
@"
<state><name>California</name><capital>Sacramento</capital></state>
"
+
@"
<state><name>Nevada</name><capital>Carson City</capital></state>
"
+
@"
</states></US>
"
;
//
Convert the xml string to bytes and load into a memory stream.
byte
[] xmlBytes
=
Encoding.UTF8.GetBytes(xml);
MemoryStream stream
=
new
MemoryStream(xmlBytes,
false
);
//
Create a DataSet and load the xml into it.
DataSet
set
=
new
DataSet();
set
.ReadXml(stream);
//
Set the DataSource to the DataSet, and the DataMember
//
to state.
bindingSource1.DataSource
=
set
;
bindingSource1.DataMember
=
"
state
"
;
textBox1.DataBindings.Add(
"
Text
"
, bindingSource1,
"
name
"
);
textBox2.DataBindings.Add(
"
Text
"
, bindingSource1,
"
capital
"
);
}
//
------------------------------------------------------
//
DataGridView BindingSource绑定更新示例.txt.cs
//
根据selectCommand生成增、删、改 命令 SqlCommandBuilder
using
System;
using
System.Data;
using
System.Data.SqlClient;
using
System.Windows.Forms;
public
class
Form1 : System.Windows.Forms.Form
{
private
DataGridView dataGridView1
=
new
DataGridView();
private
BindingSource bindingSource1
=
new
BindingSource();
private
SqlDataAdapter dataAdapter
=
new
SqlDataAdapter();
private
Button reloadButton
=
new
Button();
private
Button submitButton
=
new
Button();
[STAThreadAttribute()]
public
static
void
Main()
{
Application.Run(
new
Form1());
}
//
Initialize the form.
public
Form1()
{
dataGridView1.Dock
=
DockStyle.Fill;
reloadButton.Text
=
"
reload
"
;
submitButton.Text
=
"
submit
"
;
reloadButton.Click
+=
new
System.EventHandler(reloadButton_Click);
submitButton.Click
+=
new
System.EventHandler(submitButton_Click);
FlowLayoutPanel panel
=
new
FlowLayoutPanel();
panel.Dock
=
DockStyle.Top;
panel.AutoSize
=
true
;
panel.Controls.AddRange(
new
Control[] { reloadButton, submitButton });
this
.Controls.AddRange(
new
Control[] { dataGridView1, panel });
this
.Load
+=
new
System.EventHandler(Form1_Load);
this
.Text
=
"
DataGridView databinding and updating demo
"
;
//
处理数据异常事件
this
.dataGridView1.DataError
+=
new
DataGridViewDataErrorEventHandler(dataGridView1_DataError);
}
void
dataGridView1_DataError(
object
sender, DataGridViewDataErrorEventArgs e)
{
MessageBox.Show(e.Exception.Message);
e.Cancel
=
true
;
}
private
void
Form1_Load(
object
sender, System.EventArgs e)
{
//
Bind the DataGridView to the BindingSource
//
and load the data from the database.
dataGridView1.DataSource
=
bindingSource1;
GetData(
"
select * from tuser
"
);
}
private
void
reloadButton_Click(
object
sender, System.EventArgs e)
{
//
Reload the data from the database.
GetData(dataAdapter.SelectCommand.CommandText);
}
private
void
submitButton_Click(
object
sender, System.EventArgs e)
{
//
Update the database with the user's changes.
dataAdapter.Update((DataTable)bindingSource1.DataSource);
}
private
void
GetData(
string
selectCommand)
{
try
{
//
Specify a connection string. Replace the given value with a
//
valid connection string for a Northwind SQL Server sample
//
database accessible to your system.
String connectionString
=
"
Integrated Security=SSPI;Persist Security Info=False;
"
+
@"
Initial Catalog=Migrate;Data Source=.\SQLSERVER2005
"
;
//
Create a new data adapter based on the specified query.
dataAdapter
=
new
SqlDataAdapter(selectCommand, connectionString);
//
Create a command builder to generate SQL update, insert, and
//
delete commands based on selectCommand. These are used to
//
update the database.
//
根据selectCommand生成增、删、改 命令
SqlCommandBuilder commandBuilder
=
new
SqlCommandBuilder(dataAdapter);
//
Populate a new data table and bind it to the BindingSource.
DataTable table
=
new
DataTable();
table.Locale
=
System.Globalization.CultureInfo.InvariantCulture;
dataAdapter.Fill(table);
bindingSource1.DataSource
=
table;
//
Resize the DataGridView columns to fit the newly loaded content.
dataGridView1.AutoResizeColumns(
DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader);
//
隐藏ID列
this
.dataGridView1.Columns[
0
].Visible
=
false
;
}
catch
(SqlException)
{
MessageBox.Show(
"
To run this example, replace the value of the
"
+
"
connectionString variable with a connection string that is
"
+
"
valid for your system.
"
);
}
}
}
//
------------------------------------------------------------------
//
dataGridView1_CellFormatting
//
if (Int32.TryParse((String)e.Value, out intValue) &&
//
(intValue < 0))
//
经典转换
using
System;
using
System.Drawing;
using
System.Windows.Forms;
namespace
ns2
{
public
class
Form1 : Form
{
private
DataGridView dataGridView1
=
new
DataGridView();
private
Bitmap highPriImage;
private
Bitmap mediumPriImage;
private
Bitmap lowPriImage;
public
Form1()
{
//
Initialize the images.
try
{
highPriImage
=
new
Bitmap(
"
red.bmp
"
);
mediumPriImage
=
new
Bitmap(
"
green.bmp
"
);
lowPriImage
=
new
Bitmap(
"
brown.bmp
"
);
}
catch
(ArgumentException)
{
MessageBox.Show(
"
The Priority column requires Bitmap images
"
+
"
named highPri.bmp, mediumPri.bmp, and lowPri.bmp
"
+
"
residing in the same directory as the executable file.
"
);
}
//
Initialize the DataGridView.
dataGridView1.Dock
=
DockStyle.Fill;
dataGridView1.AllowUserToAddRows
=
false
;
dataGridView1.Columns.AddRange(
new
DataGridViewTextBoxColumn(),
new
DataGridViewImageColumn());
dataGridView1.Columns[
0
].Name
=
"
Balance
"
;
dataGridView1.Columns[
1
].Name
=
"
Priority
"
;
dataGridView1.Rows.Add(
"
-100
"
,
"
high
"
);
dataGridView1.Rows.Add(
"
0
"
,
"
medium
"
);
dataGridView1.Rows.Add(
"
100
"
,
"
low
"
);
dataGridView1.CellFormatting
+=
new
System.Windows.Forms.DataGridViewCellFormattingEventHandler(
this
.dataGridView1_CellFormatting);
this
.Controls.Add(dataGridView1);
}
//
Changes how cells are displayed depending on their columns and values.
private
void
dataGridView1_CellFormatting(
object
sender,
System.Windows.Forms.DataGridViewCellFormattingEventArgs e)
{
//
Set the background to red for negative values in the Balance column.
if
(dataGridView1.Columns[e.ColumnIndex].Name.Equals(
"
Balance
"
))
{
Int32 intValue;
if
(Int32.TryParse((String)e.Value,
out
intValue)
&&
(intValue
<
0
))
{
e.CellStyle.BackColor
=
Color.Red;
e.CellStyle.SelectionBackColor
=
Color.DarkRed;
}
}
//
Replace string values in the Priority column with images.
if
(dataGridView1.Columns[e.ColumnIndex].Name.Equals(
"
Priority
"
))
{
//
Ensure that the value is a string.
String stringValue
=
e.Value
as
string
;
if
(stringValue
==
null
)
return
;
//
Set the cell ToolTip to the text value.
DataGridViewCell cell
=
dataGridView1[e.ColumnIndex, e.RowIndex];
cell.ToolTipText
=
stringValue;
//
Replace the string value with the image value.
switch
(stringValue)
{
case
"
high
"
:
e.Value
=
highPriImage;
break
;
case
"
medium
"
:
e.Value
=
mediumPriImage;
break
;
case
"
low
"
:
e.Value
=
lowPriImage;
break
;
}
}
}
public
static
void
Main()
{
Application.Run(
new
Form1());
}
}
}