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string ¶ÔÓ¦ varchar¡¢Int16 ¶ÔÓ¦ smallint¡£µ±È»Äú¿ÉÊÓ×Ô¼ºµÄÐèÇó£¬Ð޸ĴúÂëÔÙÀ©³ä¡£

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±¾Ê¾ÀýÓÃÁËÒ»¸ö ADO.NET ÊéÉϽ̵ļ¼ÇÉ£¬´îÅä DataReader£¬ÔÚµ¥Ò»´ÎµÄÊý¾Ý¿â connection
ÖУ¬Ò»´Î¾ÍÈ¡»Ø¶à¾ä SQL Óï¾ä£¬ËùҪߢȡµÄ¶à¸ö ResultSet (´ËΪ¶àÐжàÁеĶþάÀàÐÍÊý¾Ý),
ÒÔÌáÉý³ÌÐòÐÔÄÜ£¬ÈçÏ·½´úÂëËùʾ£º
genDataSet() 1 using (SqlConnection conn = new SqlConnection(strConnString)) 2 { 3 conn.Open(); 4 using (SqlCommand cmd = new SqlCommand()) 5 { 6 cmd.Connection = conn; 7 cmd.CommandText = strSql; 8 using (SqlDataReader dr = cmd.ExecuteReader()) 9 { 10 //¶à´Îò¡È¡ ResultSet (¶àÐжàÁеĶþάÀàÐÍÊý¾Ý) 11 for (int ii = 0; ii < intDataTableCount; ii++ ) 12 { 13 dtInsertInput = new DataTable(); 14 15 dcInsertInput = new DataColumn(); 16 dcInsertInput.DataType = Type.GetType("System.String"); 17 dcInsertInput.ColumnName = "TableName"; 18 dtInsertInput.Columns.Add(dcInsertInput); 19 20 dcInsertInput = new DataColumn(); 21 dcInsertInput.DataType = Type.GetType("System.String"); 22 dcInsertInput.ColumnName = "ColumnName"; 23 dtInsertInput.Columns.Add(dcInsertInput); 24 25 dcInsertInput = new DataColumn(); 26 dcInsertInput.DataType = Type.GetType("System.String"); 27 dcInsertInput.ColumnName = "DataType"; 28 dtInsertInput.Columns.Add(dcInsertInput); 29 30 while (dr.Read()) 31 { 32 drInsertInput = dtInsertInput.NewRow(); 33 drInsertInput["TableName"] = dr.GetString(1); 34 drInsertInput["ColumnName"] = dr.GetString(2); 35 drInsertInput["DataType"] = dr.GetString(6); 36 dtInsertInput.Rows.Add(drInsertInput); 37 //Response.Write(dr.GetString(1) + ", " + dr.GetString(2).ToString() + ",
" + dr.GetString(6).ToString() + "<br>"); 38 } 39 40 //½«ÕâÒ»´ÎߢȡµÄ ResultSet£¬´æÈëÒ»¸öÐ嵀 DataTable ºó£¬
ÔÙ°ÑÕâÒ»¸ö DataTable ´æÈë DataSet Àï 41 ds.Tables.Add(dtInsertInput); 42 43 //dtInsertInput.Clear(); 44 45 dr.NextResult(); //µ½ DataReader µÄÏÂÒ»¸ö ResultSet ¼ÌÐø¶ÁÈ¡Êý¾Ý 46 47 Label1.Text += "ÒѾ´´½¨ÁËµÚ " + ds.Tables.Count + " ¸öÀà<br>"; 48 } 49 } 50 51 dcInsertInput.Dispose(); 52 dtInsertInput.Dispose(); 53 } 54 } |
ÓÐÐ©ÍøÕ¾ÏµÍ³µÄÉè¼Æ£¬»á²ÉÓḷֲãʽ; ¶à²ãʽ (n-Tier)¡¹µÄ¼Ü¹¹£¬ÈçÏÂͼ 5 Ëùʾ¡£ÔÚ Layer
Óë Layer Ö®¼äµÄÊý¾Ý´«µÝ£¬»òµç×Ó±íµ¥ÖÐÓû§ËùÊäÈëµÄ¶à¸ö×Ö¶ÎÖµµÄ´«µÝ£¬Òà¿É͸¹ý´ËÖÖ Mapping
Ó³ÉäÀàµÄ instance£¬À´°ïæ´«µÝ´óÁ¿µÄÊý¾Ý£»»¹ÓÐЩ Java/J2EE µÄÊéÖлáÌáµ½£¬¿ÉÔÙ½«ÕâЩÊý¾ÝÔÝ´æÔÚÄÚ´æÖУ¬ÒÔ×öһЩ¡¸³Ö¾ÃÐÔ
(persistence)¡¹µÄÑÓÉìÓ¦Óã¬ÕâЩÔÝ´æÔÚÄÚ´æÀïµÄ class µÄ¶à¸ö×Ö¶ÎÖµ£¬ÒÔºóËæÊ±¿É´ÓÄÚ´æÖÐÈ¡³öÔÙʹÓá£
Model ʵÀý²ã
namespace com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.Model
{
public class Product //´ËÒ»¡¸ÀࡹµÄÃû³Æ£¬»á¶ÔÓ¦ÖÁÊý¾Ý¿âµÄͬÃû¡¸Êý¾Ý±í¡¹Product
{
private int _id; //´ËΪ .NET µÄ¡¸×Ö¶Î(field)¡¹£¬¶ÔÓ¦ÖÁ Product ±íµÄͬÃû¡¸×ֶΡ¹ID
private string _name;
private decimal _price;
public int ID //´ËΪ .NET µÄ¡¸ÊôÐÔ(property)¡¹£¬¶ÔÓ¦ÖÁ Product ±íµÄͬÃû¡¸×ֶΡ¹ID
{
set { _id = value; }
get { return _id; }
}
public decimal Price
{
set { _price = value; }
get { return _price; }
}
public string Name
{
set { _name = value; }
get { return _name; }
}
}
} |
View չʾ²ã
public partial class _Default : System.Web.UI.Page
{
//Óû§µ¥»÷ submit Ëͳö°´Å¥£¬Óû¡¸Ìí¼Ó¡¹Ò»±Ê¼Ç¼µ½Êý¾Ý¿âµÄ Product ±í
protected void Button1_Click(object sender, EventArgs e)
{
com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.Model.Product model = new com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.Model.Product();
//Ò»¸ö Model ʵÀý²ãµÄ¶ÔÏó
com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.BLL.Product bll = new com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.BLL.Product();
//Ò»¸ö BLL ²ãµÄ¶ÔÏó
model.ID = TextBox1.Text;
//½«Óû§ÔÚ±íµ¥ÖУ¬ËùÊäÈëµÄ ID Êý¾Ý£¬´æ´¢(set) ÖÁ Model ʵÀý²ãµÄ¶ÔÏó
model.Name = TextBox2.Text;
//½«Óû§ÔÚ±íµ¥ÖУ¬ËùÊäÈëµÄ Name Êý¾Ý£¬´æ´¢(set) ÖÁ Model ʵÀý²ãµÄ¶ÔÏó
model.Price = TextBox3.Text;
//½«Óû§ÔÚ±íµ¥ÖУ¬ËùÊäÈëµÄ Price Êý¾Ý£¬´æ´¢(set) ÖÁ Model ʵÀý²ãµÄ¶ÔÏó
bll.executeInsert(model); //½«°ü×°ºÃµÄÓû§ÊäÈëÊý¾ÝµÄ¼¯ºÏ£¬´«µÝÖÁ BLL ÉÌÒµÂß¼²ã
}
} |
BLL ÉÌÒµÂß¼²ã
namespace com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.BLL
{
public class Product
{
//Ò»¸ö DAL Êý¾Ý·ÃÎʲãµÄ¶ÔÏó
private com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.DAL.Product dal = new com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.DAL.Product();
public int executeInsert(com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.Model.Product model)
{
//ÕâÀï¿ÉÒÔ¼ÓÈëÆäËûµÄÉÌÒµÂß¼
//½«°ü×°ºÃµÄÓû§ÊäÈëÊý¾ÝµÄ¼¯ºÏ£¬´«µÝÖÁ DAL Êý¾Ý·ÃÎʲã
return dal.executeInsert(model);
}
}
} |
DAL Êý¾Ý·ÃÎʲã
namespace com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.DAL
{
public class Product
{
public int executeInsert(com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.Model.Product model)
{
StringBuilder strSql = new StringBuilder();
//ÔÚÕâÀï×éºÏ³öÍêÕûµÄ SQL Óï¾ä
strSql.Append("INSERT INTO Product(ID, Name, Price) VALUES (@ID, @Name, @Price)");
//ADO.NET ÖÐµÄ SqlParameterCollection ÀàµÄÓ¦Óã¬±íµ¥ÖÐËùÓÐÊäÈëÊý¾ÝµÄ¼¯ºÏ
System.Data.SqlClient.SqlParameter[] params = {
new SqlParameter("@ID", SqlDbType.Int),
new SqlParameter("@Name", SqlDbType.NVarchar, 30),
new SqlParameter("@Price", SqlDbType.Decimal) };
//ÔÚÕ⽫Óû§ÔÚ±íµ¥ÖÐÊäÈëµÄ¶à¸öÊý¾Ý£¬ÖðÒ»ÌîÈë SQL Óï¾äÀïµÄ¡¸²ÎÊý(parameters)¡¹
params[0].Value = model.ID;
params[1].Value = model.Name;
params[2].Value = model.Price;
//½«×éºÏºÃµÄÕû¾ä SQL Óï¾ä£¬
͸¹ý¹²Óõġ¸DBUtility Êý¾Ý¿â·ÃÎÊÀࡹDbHelper£¬Å×ÈëÊý¾Ý¿âÈ¥Ö´ÐС¸Ìí¼Ó¡¹µÄ¶¯×÷
com.¹«Ë¾Ãû³Æ.ÏîÄ¿Ãû³Æ.DBUtility.DbHelper dbh;
int intResult = dbh.executeInsert(strSql.ToString(), params);
return intResult;
}
}
} |
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ADO.NET ÌṩµÄ SqlParameterCollection ÀàÒ²ºÜºÃÓã¬ÇÒ¿ÉÊÂÏÈÉèÖúöÔÓ¦µÄÊý¾Ý±íÀ×ֶεÄÀàÐͺͳ¤¶È£¬ÈçÉÏ·½
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