C#中对DatagridView部分常用操作

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 TheirBehavior and

AppearanceHost 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 ControlSamples：

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 ControlSamples:

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 ControlSamples：

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 ControlSamples：

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 ControlSamples:

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 ControlSamples：

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 ControlSamples:


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 ControlSamples：

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-OnlySamples：

dataGridView1.Columns["CompanyName"].ReadOnly = true;


13、移去自动生成的列


Remove Autogenerated Columns from a Windows Forms DataGridView ControlSample:

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 ControlSample：

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

Controlthis.dataGridView1.EditMode

= DataGridViewEditMode.EditOnEnter;


16、新行指定默认值


Specify Default Values for New Rows in the Windows

Forms DataGridView ControlSample：

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 ControlSamples：

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;

}