C#中对DatagridView的部分常用操作

C#中对DatagridView的部分常用操作

　【IT168技术文档】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:

　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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