C#中对DatagridView的部分常用操作

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C#中对DatagridView的部分常用操作

dbfC#DataGridView中的常用技巧
只列出技巧部分,后面会有补充
0(最基本的技巧). 获取某列中的某行(某单元格)中的内容
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、自定义列

//定义列宽
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
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;
}

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