asp.net小孔子cms中的数据添加修改
发布于 2016-06-21 22:36:36 | 100 次阅读 | 评论: 0 | 来源: 网友投递
ASP.NET
ASP.NET 是.NET FrameWork的一部分，是一项微软公司的技术，是一种使嵌入网页中的脚本可由因特网服务器执行的服务器端脚本技术，它可以在通过HTTP请求文档时再在Web服务器上动态创建它们。 指 Active Server Pages（动态服务器页面） ，运行于 IIS（Internet Information Server 服务，是Windows开发的Web服务器）之中的程序 。
最近都在看小孔子cms的代码，其添加与修改数据十分方便，做下笔记，代码主要提取自小孔子cms，去掉了不用的函数并把相关代码写到一个文件中
题外话：我为什么研究小孔子的cms，从我自己写一个cms我就开始研究起别人的cms，早期我是研究netcms，但这系统过于庞大，看上去十分的累，也没那个精力，于是打算从一套比较小的开始研究，于是小孔子cms就进入了我的研究范围。没过多久我就放下我手中的cms，决定研究清楚有了更多经验再继续写完我没有完成的cms。
最近都在看小孔子cms的代码，其添加与修改数据十分方便，做下笔记，代码主要提取自小孔子cms，去掉了不用的函数并把相关代码写到一个文件中：
结合上面的图片，当我们要往数据库中添加数据时，代码如下：
dataHandle doh = new dataHandle();
doh.AddBind(tbxWebName, "link_webname", true);
doh.AddBind(tbxWebUrl, "link_weburl", true);
doh.AddBind(tbxLogoUrl, "link_logourl", true);
doh.AddBind(tbxOrderNum, "link_ordernum", false);
doh.AddBind(ddlStyle, "link_style", false);
doh.AddBind(rblAudit, "link_audit", false);
doh.Add();
int result = Convert.ToInt32(doh.InsertData("db_link"));
Response.Write(result.ToString());
绑定数据指的是从数据库中读取一条记录，并自动绑定到表单的控件中，代码如下(假设读取的id=8)：
dataHandle doh = new dataHandle();
doh.AddBind(tbxWebName, "link_webname", true);
doh.AddBind(tbxWebUrl, "link_weburl", true);
doh.AddBind(tbxLogoUrl, "link_logourl", true);
doh.AddBind(tbxOrderNum, "link_ordernum", false);
doh.AddBind(ddlStyle, "link_style", false);
doh.AddBind(rblAudit, "link_audit", false);
doh.ConditionExpress = "id = 8";
doh.tableName = "db_link";
doh.BindWhenUp();
修改数据与添加数据差不多：
dataHandle doh = new dataHandle();
doh.ConditionExpress = "id = 8";
doh.AddBind(tbxWebName, "link_webname", true);
doh.AddBind(tbxWebUrl, "link_weburl", true);
doh.AddBind(tbxLogoUrl, "link_logourl", true);
doh.AddBind(tbxOrderNum, "link_ordernum", false);
doh.AddBind(ddlStyle, "link_style", false);
doh.AddBind(rblAudit, "link_audit", false);
doh.Add();
int result = Convert.ToInt32(doh.UpData("db_link"));
Response.Write(result);
而aspx文件详细代码： XML/HTML复制代码
网站：
<asp:TextBox ID="tbxWebName" runat="server"></asp:TextBox>
<br />
<br />
域名：<asp:TextBox ID="tbxWebUrl" runat="server"></asp:TextBox><br />
<br />
logo地址：<asp:TextBox ID="tbxLogoUrl" runat="server" Width="198px"></asp:TextBox><br />
<br />
排序：<asp:TextBox ID="tbxOrderNum" runat="server"></asp:TextBox><br />
<br />
是否审核：<asp:RadioButtonList ID="rblAudit" runat="server" RepeatDirection="Horizontal">
<asp:ListItem Value="1">是</asp:ListItem>
<asp:ListItem Selected="True" Value="0">否</asp:ListItem>
</asp:RadioButtonList>
<br />
<br />
显示方式：
<br />
<asp:DropDownList ID="ddlStyle" runat="server">
<asp:ListItem Value="1">文字</asp:ListItem>
<asp:ListItem Value="2">图片</asp:ListItem>
<asp:ListItem Value="3">待定</asp:ListItem>
</asp:DropDownList><br />
<br />
<asp:Button ID="btnOk" runat="server" Text="提交" OnClick="btnOk_Click" /> <asp:Button
ID="btnEnter" runat="server" OnClick="btnEnter_Click" Text="绑定" />
<asp:Button ID="btnUp" runat="server" OnClick="btnUp_Click" Text="更改" /><br />
<br />
<asp:Label ID="lblResult" runat="server" Text="结果"></asp:Label></div>
我对代码做了很多注释，大家有兴趣可以看看：
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
using System.Text;
namespace mycms.DataOper.Data
{
/// <summary>
/// dataHandle 的摘要说明
/// </summary>
public class dataHandle
{
public dataHandle()
{
this.conn = new OleDbConnection("Provider = Microsoft.Jet.OLEDB.4.0;Data Source = |DataDirectory|mycms.mdb");
this.conn.Open();
this.cmd = conn.CreateCommand();
this.da = new OleDbDataAdapter();
}
#region webform
//这个用来存放包括控件类型，字段，是否是字符串
public ArrayList alBinderItems = new ArrayList(8);
//这个只用来存放字段，值
public ArrayList alFieldItems = new ArrayList(8);
/// <summary>
/// 建立文本框到数据字段的绑定
/// </summary>
public void AddBind(TextBox tbx, string field, bool isStringType)
{
alBinderItems.Add(new BinderItem(tbx, field, isStringType));
}
/// <summary>
/// 下拉列表
/// </summary>
public void AddBind(DropDownList dd, string field, bool isStringType)
{
alBinderItems.Add(new BinderItem(dd, field, isStringType));
}
public void AddBind(RadioButtonList rb, string field, bool isStringType)
{
alBinderItems.Add(new BinderItem(rb, field, isStringType));
}
/// <summary>
/// 多选框
/// </summary>
public void AddBind(CheckBoxList cb, string field, bool isStringType)
{
alBinderItems.Add(new BinderItem(cb, field, isStringType));
}
/// <summary>
/// 需要修改数据时取出数据库中的记录填充到表单中
/// </summary>
public void BindWhenUp()
{
if (alBinderItems.Count == 0)
{
return;
}
BinderItem bi;
StringBuilder sbSql = new StringBuilder("select ");
for (int i = 0; i < alBinderItems.Count; i++)
{
bi = (BinderItem)alBinderItems[i];
//防止出现变量名
sbSql.Append("[" + bi.field + "]");
sbSql.Append(",");
}
sbSql.Remove(sbSql.Length - 1,1);
sbSql.Append(" from ");
sbSql.Append(this.tableName);
sbSql.Append(" where 1 = 1 and ");
sbSql.Append(this.ConditionExpress);
this.sqlCmd = sbSql.ToString();
dt = this.GetDataTable();
//如果没有记录则抛出异常
if (dt.Rows.Count == 0)
{
throw new ArgumentException("记录不存在");
}
DataRow dr = dt.Rows[0];
for (int j = 0; j < alBinderItems.Count; j++)
{
bi = (BinderItem)alBinderItems[j];
bi.SetValue(dr[bi.field].ToString());
}
}
/// <summary>
/// 该方法实现从alBinderItems到alFieldItems的转换，目的：alFieldItems可以转为DbKeyItem，操作数据库时需要用到DbKeyItem
/// </summary>
public void Add()
{
if (this.alBinderItems.Count == 0)
{
return;
}
BinderItem bi = null;
for (int i = 0; i < alBinderItems.Count; i++)
{
bi = ((BinderItem)alBinderItems[i]);
AddFieldItem(bi.field, bi.GetValue());
}
}
/// <summary>
/// 添加一个字段/值对到数组中
/// </summary>
public void AddFieldItem(string _fieldName, object _fieldValue)
{
_fieldName = "[" + _fieldName + "]";
//遍历看是否已经存在字段名
for (int i = 0; i < this.alFieldItems.Count; i++)
{
if (((DbKeyItem)this.alFieldItems[i]).fieldName == _fieldName)
{
throw new ArgumentException("字段已经存在");
}
}
this.alFieldItems.Add(new DbKeyItem(_fieldName, _fieldValue));
}
#endregion
#region 操作数据
#region 这里声明有关数据操作的必要参数
//当前所使用的数据库连接
protected OleDbConnection conn;
//当前所使用的命令对象
protected OleDbCommand cmd = new OleDbCommand();
//当前所使用的数据库适配器
protected OleDbDataAdapter da;
//当前的SQL语句
public string sqlCmd = string.Empty;
//当前操作所涉及的数据库表名
public string tableName = string.Empty;
//SQL条件
public string ConditionExpress;
//用于存放从数据库中取得的数据记录
protected DataTable dt;
#endregion
/// <summary>
/// 根据当前alFieldItem数组中存储的字段/值向指定表中添加一条记录。返回自动增长id
/// </summary>
/// <param name="_talbeName"></param>
/// <returns></returns>
public int InsertData(string _talbeName)
{
this.tableName = _talbeName;
this.sqlCmd = "insert into " + this.tableName + "(";
string temValue = " values(";
for (int i = 0; i < this.alFieldItems.Count; i++)
{
this.sqlCmd += ((DbKeyItem)alFieldItems[i]).fieldName + ",";
temValue += "@para" + i.ToString() + ",";
}
//分别去掉,
this.sqlCmd = Input.CutComma(this.sqlCmd) + ")" + Input.CutComma(temValue) + ")";
//声明执行语句
this.cmd.CommandText = this.sqlCmd;
GenParameters();
cmd.ExecuteNonQuery();
int autoId = 0;
try
{
cmd.CommandText = "select @@identity as id";
autoId = Convert.ToInt32(cmd.ExecuteScalar());
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
return autoId;
}
/// <summary>
/// 根据当前alFieldItem数组中存储的字段/值和条件表达式所指定的条件来更新数据库中的记录，返回受影响的行数
/// </summary>
/// <param name="_tableName">更新的数据表名称</param>
/// <returns>返回此次操作所影响的数据行数</returns>
public int UpData(string _tableName)
{
this.tableName = _tableName;
this.sqlCmd = "update " + this.tableName + " set ";
for (int i = 0; i < this.alFieldItems.Count; i++)
{
this.sqlCmd += ((DbKeyItem)alFieldItems[i]).fieldName;
this.sqlCmd += "=";
this.sqlCmd += "@para";
this.sqlCmd += i.ToString();
this.sqlCmd += ",";
}
this.sqlCmd = Input.CutComma(this.sqlCmd);
if (this.ConditionExpress != string.Empty)
{
this.sqlCmd = this.sqlCmd + " where " + this.ConditionExpress;
}
this.cmd.CommandText = this.sqlCmd;
this.GenParameters();
int effectedLines = this.cmd.ExecuteNonQuery();
return effectedLines;
}
/// 返回查询结果DataTable
public DataTable GetDataTable()
{
DataSet ds = this.GetDataSet();
return ds.Tables[0];
}
/// <summary>
/// 根据当前指定的SqlCmd获取DataSet，如果条件表达式不为空则会被清空，
/// 所以条件表达式必须包含在SqlCmd中
/// </summary>
public DataSet GetDataSet()
{
this.ConditionExpress = string.Empty;
this.cmd.CommandText = this.sqlCmd;
this.GenParameters();
DataSet ds = new DataSet();
this.da.SelectCommand = this.cmd;
this.da.Fill(ds);
return ds;
}
/// <summary>
/// 产生OleDbCommand对象所需的参数
/// </summary>
/// <returns></returns>
protected void GenParameters()
{
if (this.alFieldItems.Count > 0)
{
for (int i = 0; i < this.alFieldItems.Count; i++)
{
cmd.Parameters.AddWithValue("@para" + i.ToString(), ((DbKeyItem)alFieldItems[i]).fieldValue.ToString());
}
}
}
#endregion
}
public class BinderItem
{
//每个绑定控件都以object的形式被存储的
public object obj;
//绑定到数据库的字段名称
public string field;
//是否是字符串类型
public bool isStringType;
/// <summary>
/// 构造函数
/// </summary>
/// <param name="_o">需要绑定的控件对象</param>
/// <param name="_field">绑定到的数据表字段名称</param>
/// <param name="_isStringType">是否是字符串类型</param>
public BinderItem(object _obj, string _field, bool _isStringType)
{
this.obj = _obj;
this.field = _field;
this.isStringType = _isStringType;
}
/// <summary>
/// 根据控件类型获得控件的值
/// </summary>
/// <returns></returns>
public string GetValue()
{
//字符串类型
if (obj is String)
{
return (string)obj;
}
//下拉框
if (obj is DropDownList)
{
DropDownList dd = (DropDownList)obj;
return dd.SelectedValue;
}
//多选框
if (obj is CheckBoxList)
{
string s = string.Empty;
CheckBoxList cb = (CheckBoxList)obj;
for (int i = 0; i < cb.Items.Count; i++)
{
if (cb.Items[i].Selected)
{
s += cb.Items[i].Value + ",";
}
}
return s;
}
//文本框
if (obj is TextBox)
{
TextBox tbx = (TextBox)obj;
return tbx.Text.Trim();
}
//Label
if (obj is Label)
{
Label lbl = (Label)obj;
return lbl.Text;
}
//单选组
if (obj is RadioButtonList)
{
RadioButtonList rb = (RadioButtonList)obj;
return rb.SelectedValue;
}
return string.Empty;
}
/// <summary>
/// 根据控件类型设定控件的值
/// </summary>
/// <param name="_value">要设定的值</param>
public void SetValue(string _value)
{
//字符串类型
if (obj is string)
{
string s = (string)obj;
s = _value;
return;
}
//文本框
if (obj is TextBox)
{
TextBox tbx = (TextBox)obj;
tbx.Text = _value;
return;
}
//单选按钮
if (obj is RadioButtonList)
{
RadioButtonList rb = (RadioButtonList)obj;
rb.SelectedValue = _value;
return;
}
//下拉列表
if (obj is DropDownList)
{
DropDownList dd = (DropDownList)obj;
dd.SelectedValue = _value;
return;
}
}
}
/// <summary>
/// 数据表中的字段属性：字段名，字段值
/// </summary>
public class DbKeyItem
{
/// <summary>
/// 字段名称
/// </summary>
public string fieldName;
/// <summary>
/// 字段值
/// </summary>
public string fieldValue;
public DbKeyItem(string _fileName, object _fieldValue)
{
this.fieldName = _fileName;
this.fieldValue = _fieldValue.ToString();
}
}
}
return;
}
//单选按钮
if (obj is RadioButtonList)
{
RadioButtonList rb = (RadioButtonList)obj;
rb.SelectedValue = _value;
return;
}
//下拉列表
if (obj is DropDownList)
{
DropDownList dd = (DropDownList)obj;
dd.SelectedValue = _value;
return;
}
}
}
/// <summary>
/// 数据表中的字段属性：字段名，字段值
/// </summary>
public class DbKeyItem
{
/// <summary>
/// 字段名称
/// </summary>
public string fieldName;
/// <summary>
/// 字段值
/// </summary>
public string fieldValue;
public DbKeyItem(string _fileName, object _fieldValue)
{
this.fieldName = _fileName;
this.fieldValue = _fieldValue.ToString();
}
}
}
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