数据访问组件,提供了一组类库和一个代码生成工具,使.net项目中数据访问更简化.
xml version="1.0" encoding="utf-8" ?>
<connections>
<connection databaseType="SQL">Data Source=.\SQLEXPRESS;AttachDbFilename="|DataDirectory|Database1.mdf";
Integrated Security=True;User Instance=Trueconnection>
connections>
RaisingStudio.Data.Providers.DataContext dc = new RaisingStudio.Data.Providers.DataContext();
dc.Insert(issue);
dc.Update(issue);
dc.Delete(issue);
dc.Delete(issueID);
IEnumerable query = dc.Query();
foreach(Issue issue in query)
{
}
IList issueList = dc.QueryForList();
DataTable dataTable = dc.QueryForDataTable(Issue._.IssueID > 1);
Issue issue = new Issue();
issue.IssueID = 2;
issue = dc.GetData(issue);
Issue issue = dc.GetData(2);
Issue issue = dc.GetData(Issue._.IssueID == 2);
int result = dc.UpdateDataTable(dataTable);
int result = dc.GetCount();
object minValue = dc.GetMin(Issue._.Progress);
decimal maxValue = Convert.ToDecimal(dc.GetMax(Issue._.Progress,
Issue._.Title == "test title"));
int result = dc.Save(issue);
bool saved = dc.Exists(issue);
bool ex = dc.Exists(Issue._.Title == "test title");
Issue issue = dc.GetData(2, Issue._.Status);
issue.Status = IssueStatus.Fixed;
int result = dc.Update(issue, Issue._.Status);
int result = dc.Delete(Issue._.Status == IssueStatus.Fixed);
result = dc.Update(issue, Issue._.Status == IssueStatus.Fixed, Issue._.Status);
IEnumerable query = dc.Query(Issue.All.OrderBy(Issue._.IssueID));
query = dc.Query(Issue._.Status == IssueStatus.Fixed ^ Issue._.IssueID);
IList issueList = dc.QueryForList(Issue.All, 0, 100);
try
{
this.dc.BeginTransaction();
try
{
int result = this.dc.Insert(issue);
this.dc.CommitTransaction();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex);
this.dc.RollbackTransaction();
throw;
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex);
throw;
}
MutipleKeysTable mt = dc.GetData(new object[] { key1, key2 },
MutipleKeysTable.Except(MutipleKeysTable._.Value2));
CommonCommand cmd = new CommonCommand();
cmd.CommandText = string.Format("SELECT [IssueID], [{0}] FROM .[Issue] WHERE [{0}] = @p1", Issue._.Title);
cmd.Parameters.Add("@p1", "test title");
Issue issue = dc.GetData(cmd);
RaisingStudio.Data.CommonCommand cmd = new CommonCommand(
string.Format("UPDATE .[{0}] SET [{1}] = [{1}] + 1 WHERE [{2}] = @p1",
Issue._, Issue._.Progress, Issue._.IssueID));
cmd.AddParameter("@p1", System.Data.DbType.Int32, maxID);
int result = this.dc.ExecuteNoQuery(cmd);
DataContext dc = new DataContext();
dc.Log = System.Console.Out;
<provider
name="MYSQL"
description="MySQL, MySQL provider "
enabled="false"
assemblyName="MySql.Data, Version=5.2.5.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"
connectionClass="MySql.Data.MySqlClient.MySqlConnection"
commandClass="MySql.Data.MySqlClient.MySqlCommand"
parameterClass="MySql.Data.MySqlClient.MySqlParameter"
parameterDbTypeClass="MySql.Data.MySqlClient.MySqlDbType"
parameterDbTypeProperty="MySqlDbType"
dataAdapterClass="MySql.Data.MySqlClient.MySqlDataAdapter"
commandBuilderClass="MySql.Data.MySqlClient.MySqlCommandBuilder"
usePositionalParameters="false"
useParameterPrefixInSql="true"
useParameterPrefixInParameter="true"
parameterPrefix="?"
allowMARS="false"
/>
public class PointConverter : IDbTypeConverter
{
#region IDbTypeConvertermember
public object ConvertFromDbType(object value)
{
string s = value as string;
if (!string.IsNullOrEmpty(s))
{
string[] sa = s.Split(',');
if ((sa != null) && (sa.Length == 3))
{
int x = int.Parse(sa[0]);
int y = int.Parse(sa[1]);
int z = int.Parse(sa[2]);
return new Point(x, y, z);
}
}
return null;
}
public object ConvertToDbType(object value)
{
if (value is Point)
{
Point point = (Point)value;
return point.ToString();
}
return null;
}
#endregion
}
dbType="string"
converterType="RaisingStudio.Data.Entities.PointConverter,
RaisingStudio.Data.Entities, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
converter>
xml version="1.0" encoding="utf-8"?>
<definitionsConfig xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<aliases>
aliases>
<definitions>
<definition name="UTIssue" resource="definitions/Issue.definition.xml" />
<definition name="UTSystemUser" resource="definitions/SystemUser.definition.xml" />
definitions>
definitionsConfig>
xml version="1.0" encoding="utf-8" ?>
<commands parameterPrefix=":">
<command name="select">SELECT * FROM DAC_ISSUEcommand>
<command name="select2">
</span><span style="color: gray;" mce_style="color: gray;"><br /> SELECT * FROM DAC_USER<br /> </span><span style="color: blue;" mce_style="color: blue;">
command>
<command name="select3" commandType="StoredProcedure">SELECT_DAC_ISSUEcommand>
<command name="select4">
</span><span style="color: gray;" mce_style="color: gray;"><br /> SELECT * FROM DAC_ISSUE DI<br /> WHERE DI.ISSUE_ID = :ISSUE_ID<br /> </span><span style="color: blue;" mce_style="color: blue;">
command>
commands>
CommonCommand cmd = CommandManager.Instance.GetCommand("select");
System.Data.DataTable dt = this.dc.ExecuteForDataTable(cmd);
不好意思,借首页作个广告,给大家介绍个开源的数据访问组件Data Access Component,项目网站:http://dac.codeplex.com . 项目描述: 数据访问组件,提供了一组类库和一个代码生成工具,使.net项目中数据访问更简化. 功能: 多种数据库支持. 提供DataSet, DataTable 和数据实体查询. 执行SQL脚本及存储过程. 条件表达式. 常用SQL方法,
mysql delphi An overview of VCL components allowing you to access a MySQL database from Delphi using standard data controls without using BDE/ADO/ODBC. Plus a few MYSQL related tools. MySQL a reliable
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