如何在.NET框架下创建Access数据库和表？

添加人：iyond

添加时间：2007-05-09 阅读次数：1743

C#:
 
<%@ Page Language="C#" %>

<%@ Import Namespace="ADOX" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
	/// <summary>
	/// CreateAccessDB 的摘要说明。
	/// 对于不同版本的ADO，需要添加不同的引用
	/// 请添加引用Microsoft ADO Ext. 2.7 for DDL and Security
	/// 请添加引用Microsoft ADO Ext. 2.8 for DDL and Security
	/// </summary>

	protected void Page_Load( object sender, EventArgs e )
	{
	  //为了方便测试，数据库名字采用比较随机的名字，以防止添加不成功时还需要重新启动IIS来删除数据库。
	  string dbName = Server.MapPath("~/_Test") + "\\NewMDB" + DateTime.Now.Millisecond.ToString() + ".mdb";
	  ADOX.CatalogClass cat = new ADOX.CatalogClass();
	  cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + dbName + ";");
	  Response.Write("数据库：" + dbName + "已经创建成功！");
	  ADOX.TableClass tbl = new ADOX.TableClass();
	  tbl.ParentCatalog = cat;
	  tbl.Name = "MyTable";

	  //增加一个自动增长的字段
	  ADOX.ColumnClass col = new ADOX.ColumnClass();
	  col.ParentCatalog = cat;
	  col.Type = ADOX.DataTypeEnum.adInteger; // 必须先设置字段类型
	  col.Name = "id";
	  col.Properties["Jet OLEDB:Allow Zero Length"].Value = false;
	  col.Properties["AutoIncrement"].Value = true;
	  tbl.Columns.Append(col, ADOX.DataTypeEnum.adInteger, 0);

	  //增加一个文本字段
	  ADOX.ColumnClass col2 = new ADOX.ColumnClass();
	  col2.ParentCatalog = cat;
	  col2.Name = "Description";
	  col2.Properties["Jet OLEDB:Allow Zero Length"].Value = false;
	  tbl.Columns.Append(col2, ADOX.DataTypeEnum.adVarChar, 25);

	  //增加数字字段
	  ADOX.ColumnClass col3 = new ADOX.ColumnClass();
	  col3.ParentCatalog = cat;
	  col3.Name = "数字类型字段";
	  col3.Type = DataTypeEnum.adDouble;
	  col3.Properties["Jet OLEDB:Allow Zero Length"].Value = false;
	  tbl.Columns.Append(col3, ADOX.DataTypeEnum.adDouble, 666);

	  //增加Ole字段
	  ADOX.ColumnClass col4 = new ADOX.ColumnClass();
	  col4.ParentCatalog = cat;
	  col4.Name = "Ole类型字段";
	  col4.Type = DataTypeEnum.adLongVarBinary;
	  col4.Properties["Jet OLEDB:Allow Zero Length"].Value = false;
	  tbl.Columns.Append(col4, ADOX.DataTypeEnum.adLongVarBinary, 0);

	  Response.Write("<h4>得到各个列的名字：</h4>");
	  for (int i = 0 ; i < tbl.Columns.Count ; i++)
	  {
	    Response.Write("<li>" + i.ToString() + " = " + tbl.Columns[i].Name + " 类型：" + tbl.Columns[i].Type.ToString());
	  }   

	  Response.Write("<h4>删除 Description 列：</h4>");
	  tbl.Columns.Delete("Description");
	  tbl.Columns.Refresh();

	  Response.Write("<h4>修改 “数字类型字段” 列名字：</h4>");
	  ADOX.ColumnClass col5 = (ADOX.ColumnClass)tbl.Columns["数字类型字段"];
	  col5.Name = "新名字类型字段";
	  tbl.Columns.Refresh();
	  col5 = null;


	  //设置主键
	  tbl.Keys.Append("PrimaryKey", ADOX.KeyTypeEnum.adKeyPrimary, "id", "", "");
	  cat.Tables.Append(tbl);

	  msg.Text = ("<br>数据库表：" + tbl.Name + "已经创建成功！");

	  System.Runtime.InteropServices.Marshal.ReleaseComObject(tbl);
	  System.Runtime.InteropServices.Marshal.ReleaseComObject(cat);
	  tbl = null;
	  cat = null;
	  GC.WaitForPendingFinalizers();
	  GC.Collect();
	}
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
  <title>在.NET框架下动态创建Access数据库和表</title>
</head>
<body>
  <form id="form1" runat="server">
    <asp:Label ID="msg" runat="server" />
  </form>
</body>
</html>

VB.NET：
<%@ Page Language="VB" %>

<%@ Import Namespace="ADOX" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
    Dim dbName As String = "D:\NewMDB" + DateTime.Now.Millisecond.ToString + ".mdb"
    Dim cat As ADOX.CatalogClass = New ADOX.CatalogClass
    cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + dbName + ";")
    Response.Write("数据库：" + dbName + "已经创建成功！")
    Dim tbl As ADOX.TableClass = New ADOX.TableClass
    tbl.ParentCatalog = cat
    tbl.Name = "MyTable"
    Dim col As ADOX.ColumnClass = New ADOX.ColumnClass
    col.ParentCatalog = cat
    col.Type = ADOX.DataTypeEnum.adInteger
    col.Name = "id"
    col.Properties("Jet OLEDB:Allow Zero Length").Value = False
    col.Properties("AutoIncrement").Value = True
    tbl.Columns.Append(col, ADOX.DataTypeEnum.adInteger, 0)
    Dim col2 As ADOX.ColumnClass = New ADOX.ColumnClass
    col2.ParentCatalog = cat
    col2.Name = "Description"
    col2.Properties("Jet OLEDB:Allow Zero Length").Value = False
    tbl.Columns.Append(col2, ADOX.DataTypeEnum.adVarChar, 25)
    Dim col3 As ADOX.ColumnClass = New ADOX.ColumnClass
    col3.ParentCatalog = cat
    col3.Name = "数字"
    col3.Type = DataTypeEnum.adDouble
    col3.Properties("Jet OLEDB:Allow Zero Length").Value = False
    tbl.Columns.Append(col3, ADOX.DataTypeEnum.adDouble, 666)
    Dim col4 As ADOX.ColumnClass = New ADOX.ColumnClass
    col4.ParentCatalog = cat
    col4.Name = "Ole类型"
    col4.Type = DataTypeEnum.adLongVarBinary
    tbl.Columns.Append(col4, ADOX.DataTypeEnum.adLongVarBinary, 0)
    tbl.Keys.Append("PrimaryKey", ADOX.KeyTypeEnum.adKeyPrimary, "id", "", "")
    cat.Tables.Append(tbl)
    msg.Text = ("<br>数据库表：" + tbl.Name + "已经创建成功！")
    System.Runtime.InteropServices.Marshal.ReleaseComObject(tbl)
    System.Runtime.InteropServices.Marshal.ReleaseComObject(cat)
    tbl = Nothing
    cat = Nothing
    GC.WaitForPendingFinalizers()
    GC.Collect()
  End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
  <title>在.NET框架下动态创建Access数据库和表</title>
</head>
<body>
  <form id="form1" runat="server">
    <asp:Label ID="msg" runat="server" />
  </form>
</body>
</html>