WinForm(C#) DataGridView简单应用示例

一个DataGridView简单应用示例，只是简单的实现了DataGridView的数据绑定、添加、修改和删除的操作，先看代码：

 

using System; using System.Data; using System.Windows.Forms; namespace DataGridView { public partial class frmMain : Form { public frmMain() { InitializeComponent(); } private DataSet addressList; private void frmMain_Load(object sender, EventArgs e) { //从xml中加载数据 addressList = new DataSet("AddressList"); addressList.ReadXmlSchema(".//AddressList.xsd"); addressList.ReadXml(".//AddressList.xml", XmlReadMode.Auto); addressList.Locale = System.Globalization.CultureInfo.CurrentUICulture; addressList.AcceptChanges(); //绑定到datagridview dataGridView1.AutoGenerateColumns = false; dataGridView1.DataSource = addressList; dataGridView1.DataMember = "UserList"; } private void 新建NToolStripMenuItem_Click(object sender, EventArgs e) { dataGridView1.CurrentCell = dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["UserName"]; dataGridView1.BeginEdit(false); } private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e) { if (e.RowIndex != 1 && !dataGridView1.Rows[e.RowIndex].IsNewRow) { tsslUserName.Text = dataGridView1.Rows[e.RowIndex].Cells["UserName"].Value.ToString(); } } private void 退出XToolStripMenuItem_Click(object sender, EventArgs e) { this.Close(); } private void dataGridView1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e) { //验证编辑的单元格的数据 DataGridViewCell c = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex]; switch (dataGridView1.Columns[e.ColumnIndex].Name) { case "UserName": int UserNameMaxLength = addressList.Tables["UserList"].Columns["UserName"].MaxLength; if (e.FormattedValue.ToString().Length > UserNameMaxLength) { string UserNameError = "用户名不能超过" + UserNameMaxLength.ToString() + "个字符"; c.ErrorText = UserNameError; e.Cancel = false; } else if (e.FormattedValue.ToString().Length == 0) { string UserNameError = "用户名不能为空"; c.ErrorText = UserNameError; e.Cancel = false; } else { if (c.ErrorText != string.Empty) { c.ErrorText = string.Empty; } } break; case "Telephone": int TelephoneMaxLength = addressList.Tables["UserList"].Columns["UserName"].MaxLength; if (e.FormattedValue.ToString().Length > TelephoneMaxLength) { string TelephoneError = "电话号码不能超过" + TelephoneMaxLength.ToString() + "个字符"; c.ErrorText = TelephoneError; e.Cancel = false; } else { if (c.ErrorText != string.Empty) { c.ErrorText = string.Empty; } } break; case "QQ": int QQMaxLength = addressList.Tables["UserList"].Columns["QQ"].MaxLength; if (e.FormattedValue.ToString().Length > QQMaxLength) { string QQError = "电话号码不能超过" + QQMaxLength.ToString() + "个字符"; c.ErrorText = QQError; e.Cancel = false; } else { if (c.ErrorText != string.Empty) { c.ErrorText = string.Empty; } } break; case "MSN": int MSNMaxLength = addressList.Tables["UserList"].Columns["MSN"].MaxLength; if (e.FormattedValue.ToString().Length > MSNMaxLength) { string MSNError = "电话号码不能超过" + MSNMaxLength.ToString() + "个字符"; c.ErrorText = MSNError; e.Cancel = false; } else { if (c.ErrorText != string.Empty) { c.ErrorText = string.Empty; } } break; case "Address": int AddressMaxLength = addressList.Tables["UserList"].Columns["Address"].MaxLength; if (e.FormattedValue.ToString().Length > AddressMaxLength) { string AddressError = "电话号码不能超过" + AddressMaxLength.ToString() + "个字符"; c.ErrorText = AddressError; e.Cancel = false; } else { if (c.ErrorText != string.Empty) { c.ErrorText = string.Empty; } } break; case "Remark": int RemarkMaxLength = addressList.Tables["UserList"].Columns["Remark"].MaxLength; if (e.FormattedValue.ToString().Length > RemarkMaxLength) { string RemarkError = "电话号码不能超过" + RemarkMaxLength.ToString() + "个字符"; c.ErrorText = RemarkError; e.Cancel = false; } else { if (c.ErrorText != string.Empty) { c.ErrorText = string.Empty; } } break; } } private void dataGridView1_RowValidating(object sender, DataGridViewCellCancelEventArgs e) { if (dataGridView1.Rows[e.RowIndex].ErrorText != string.Empty) { dataGridView1.Rows[e.RowIndex].ErrorText = string.Empty; } if (e.RowIndex == (dataGridView1.Rows.Count - 2) && dataGridView1.Rows[e.RowIndex + 1].IsNewRow) { DataGridViewRow row = dataGridView1.Rows[e.RowIndex]; if (row.Cells["UserID"].Value == DBNull.Value) { DataRow[] drs = addressList.Tables["UserList"].Select("UserID=Max(UserID)"); int userId = 1; //计算新数据的ID if (drs.Length == 0) { userId = 1; } else { userId = (int)drs[0]["UserID"] + 1; } row.Cells["UserID"].Value = userId; } } } private void dataGridView1_DefaultValuesNeeded(object sender, DataGridViewRowEventArgs e) { //输入新记录时发生，给UserID设置一个默认值 e.Row.Cells["UserID"].Value = DBNull.Value; } private void toolStripMenuItem1_Click(object sender, EventArgs e) { Save(); } /// <summary> /// 保存数据到xml文档 /// </summary> private void Save() { try { addressList.WriteXml(".//AddressList.xml"); addressList.AcceptChanges(); MessageBox.Show("保存成功", "保存通讯录", MessageBoxButtons.OK, MessageBoxIcon.None); } catch { MessageBox.Show("保存失败", "保存通讯录", MessageBoxButtons.OK, MessageBoxIcon.Error); } } private void 删除DToolStripMenuItem_Click(object sender, EventArgs e) { DataGridViewSelectedRowCollection selectedRows = dataGridView1.SelectedRows;//获取选中的行的集合 if (selectedRows.Count > 0) { DialogResult result = MessageBox.Show("你确定要删除选定的数据吗？", "删除数据", MessageBoxButtons.YesNo, MessageBoxIcon.Question); if (result == DialogResult.Yes) { //迭代删除选中行 foreach (DataGridViewRow row in selectedRows) { dataGridView1.Rows.Remove(row); } } } } private void frmMain_FormClosing(object sender, FormClosingEventArgs e) { DataTable changeDT = addressList.Tables["UserList"].GetChanges();//获取数据集中所有的更改 if (changeDT != null && changeDT.Rows.Count > 0) { DialogResult result = MessageBox.Show("有未保存的数据，是否保存?", "保存数据", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question); switch (result) { case DialogResult.Yes: Save(); e.Cancel = false; break; case DialogResult.No: e.Cancel = false; break; case DialogResult.Cancel: e.Cancel = true; break; } } } private void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs e) { if (e.Context == DataGridViewDataErrorContexts.Commit) { dataGridView1.Rows[e.RowIndex].ErrorText = e.Exception.ToString(); e.Cancel = true; } } } }

 

数据库文件是用的xml，下面是xml和xsd文件：

XML：

<?xml version="1.0" encoding="utf-8" ?> <AddressList> <UserList> <UserID>1</UserID> <UserName>张三</UserName> <Telephone>020-0000000</Telephone> <QQ>1000</QQ> <MSN>msn@msn.com</MSN> <Address>广州市</Address> <Remark>测试</Remark> </UserList> </AddressList>

 

XSD：

 

<?xml version="1.0" encoding="utf-8"?> <xs:schema id="AddressList" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" xmlns:msprop="urn:schemas-microsoft-com:xml-msprop"> <xs:annotation> <xs:appinfo source="urn:schemas-microsoft-com:xml-msdatasource"> <DataSource DefaultConnectionIndex="0" FunctionsComponentName="QueriesTableAdapter" Modifier="AutoLayout, AnsiClass, Class, Public" SchemaSerializationMode="IncludeSchema" xmlns="urn:schemas-microsoft-com:xml-msdatasource"> <Connections /> <Tables /> <Sources /> </DataSource> </xs:appinfo> </xs:annotation> <xs:element name="AddressList" msdata:IsDataSet="true" msdata:UseCurrentLocale="true" msprop:Generator_DataSetName="AddressList" msprop:Generator_UserDSName="AddressList" msprop:EnableTableAdapterManager="False"> <xs:complexType> <xs:choice minOccurs="0" maxOccurs="unbounded"> <xs:element name="UserList" msprop:Generator_UserTableName="UserList" msprop:Generator_RowDeletedName="UserListRowDeleted" msprop:Generator_TableClassName="UserListDataTable" msprop:Generator_RowChangedName="UserListRowChanged" msprop:Generator_RowClassName="UserListRow" msprop:Generator_RowChangingName="UserListRowChanging" msprop:Generator_RowEvArgName="UserListRowChangeEvent" msprop:Generator_RowEvHandlerName="UserListRowChangeEventHandler" msprop:Generator_TablePropName="UserList" msprop:Generator_TableVarName="tableUserList" msprop:Generator_RowDeletingName="UserListRowDeleting"> <xs:complexType> <xs:sequence> <xs:element name="UserID" msdata:AutoIncrementSeed="1" msprop:Generator_UserColumnName="UserID" msprop:Generator_ColumnPropNameInRow="UserID" msprop:Generator_ColumnVarNameInTable="columnUserID" msprop:Generator_ColumnPropNameInTable="UserIDColumn" type="xs:int" /> <xs:element name="UserName" msprop:Generator_UserColumnName="UserName" msprop:Generator_ColumnPropNameInRow="UserName" msprop:Generator_ColumnVarNameInTable="columnUserName" msprop:Generator_ColumnPropNameInTable="UserNameColumn"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:maxLength value="20" /> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="Telephone" msprop:Generator_UserColumnName="Telephone" msprop:Generator_ColumnPropNameInRow="Telephone" msprop:Generator_ColumnVarNameInTable="columnTelephone" msprop:Generator_ColumnPropNameInTable="TelephoneColumn" minOccurs="0"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:maxLength value="30" /> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="QQ" msprop:Generator_UserColumnName="QQ" msprop:Generator_ColumnPropNameInRow="QQ" msprop:Generator_ColumnVarNameInTable="columnQQ" msprop:Generator_ColumnPropNameInTable="QQColumn" minOccurs="0"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:maxLength value="15" /> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="MSN" msprop:Generator_UserColumnName="MSN" msprop:Generator_ColumnPropNameInRow="MSN" msprop:Generator_ColumnVarNameInTable="columnMSN" msprop:Generator_ColumnPropNameInTable="MSNColumn" minOccurs="0"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:maxLength value="30" /> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="Address" msprop:Generator_UserColumnName="Address" msprop:Generator_ColumnPropNameInRow="Address" msprop:Generator_ColumnVarNameInTable="columnAddress" msprop:Generator_ColumnPropNameInTable="AddressColumn" minOccurs="0"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:maxLength value="100" /> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="Remark" msprop:Generator_UserColumnName="Remark" msprop:Generator_ColumnPropNameInRow="Remark" msprop:Generator_ColumnVarNameInTable="columnRemark" msprop:Generator_ColumnPropNameInTable="RemarkColumn" minOccurs="0"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:maxLength value="500" /> </xs:restriction> </xs:simpleType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:choice> </xs:complexType> <xs:unique name="Constraint1" msdata:PrimaryKey="true"> <xs:selector xpath=".//UserList" /> <xs:field xpath="UserID" /> </xs:unique> </xs:element> </xs:schema>

 

代码下载：http://download.youkuaiyun.com/source/1445933