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asp.net小孔子cms中的數據添加修改

編輯：ASP.NET基礎

題外話：我為什麼研究小孔子的cms，從我自己寫一個cms我就開始研究起別人的cms，早期我是研究netcms，但這系統過於龐大，看上去十分的累，也沒那個精力，於是打算從一套比較小的開始研究，於是小孔子cms就進入了我的研究范圍。沒過多久我就放下我手中的cms，決定研究清楚有了更多經驗再繼續寫完我沒有完成的cms。

最近都在看小孔子cms的代碼，其添加與修改數據十分方便，做下筆記，代碼主要提取自小孔子cms，去掉了不用的函數並把相關代碼寫到一個文件中：

結合上面的圖片，當我們要往數據庫中添加數據時，代碼如下：

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());
綁定數據指的是從數據庫中讀取一條記錄，並自動綁定到表單的控件中，代碼如下(假設讀取的id=8)：
復制代碼代碼如下:

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.ConditionExpress = "id = 8";
doh.tableName = "db_link";
doh.BindWhenUp();

修改數據與添加數據差不多：
復制代碼代碼如下:
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文件詳細代碼： XML/HTML復制代碼
網站：
<asp:TextBox ID="tbxWebName" runat="server"></asp:TextBox>
 
 
域名：<asp:TextBox ID="tbxWebUrl" runat="server"></asp:TextBox> 
 
logo地址：<asp:TextBox ID="tbxLogoUrl" runat="server" Width="198px"></asp:TextBox> 
 
排序：<asp:TextBox ID="tbxOrderNum" runat="server"></asp:TextBox> 
 
是否審核：<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>
 
 
顯示方式：
 
<asp:DropDownList ID="ddlStyle" runat="server">
 <asp:ListItem Value="1">文字</asp:ListItem>
 <asp:ListItem Value="2">圖片</asp:ListItem>
 <asp:ListItem Value="3">待定</asp:ListItem>
</asp:DropDownList> 
 
<asp:Button ID="btnOk" runat="server" Text="提交" OnClick="btnOk_Click" /> <asp:Button
 ID="btnEnter" runat="server" OnClick="btnEnter_Click" Text="綁定" />
<asp:Button ID="btnUp" runat="server" OnClick="btnUp_Click" Text="更改" /> 
 
<asp:Label ID="lblResult" runat="server" Text="結果"></asp:Label></div>
我對代碼做了很多注釋，大家有興趣可以看看：
復制代碼代碼如下:
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 的摘要說明
 /// </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
 //這個用來存放包括控件類型，字段，是否是字符串
 public ArrayList alBinderItems = new ArrayList(8);

 //這個只用來存放字段，值
 public ArrayList alFieldItems = new ArrayList(8);

 /// <summary>
 /// 建立文本框到數據字段的綁定
 /// </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>
 /// 多選框
 /// </summary>
 public void AddBind(CheckBoxList cb, string field, bool isStringType)
 {
 alBinderItems.Add(new BinderItem(cb, field, isStringType));
 }

 /// <summary>
 /// 需要修改數據時取出數據庫中的記錄填充到表單中
 /// </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];
 //防止出現變量名
 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();
 //如果沒有記錄則拋出異常
 if (dt.Rows.Count == 0)
 {
 throw new ArgumentException("記錄不存在");
 }

 DataRow dr = dt.Rows[0];
 for (int j = 0; j < alBinderItems.Count; j++)
 {
 bi = (BinderItem)alBinderItems[j];
 bi.SetValue(dr[bi.field].ToString());
 }


 }

 /// <summary>
 /// 該方法實現從alBinderItems到alFieldItems的轉換，目的：alFieldItems可以轉為DbKeyItem，操作數據庫時需要用到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>
 /// 添加一個字段/值對到數組中
 /// </summary>
 public void AddFieldItem(string _fieldName, object _fieldValue)
 {
 _fieldName = "[" + _fieldName + "]";
 //遍歷看是否已經存在字段名

 for (int i = 0; i < this.alFieldItems.Count; i++)
 {
 if (((DbKeyItem)this.alFieldItems[i]).fieldName == _fieldName)
 {
 throw new ArgumentException("字段已經存在");
 }
 }
 this.alFieldItems.Add(new DbKeyItem(_fieldName, _fieldValue));
 }
 #endregion


 #region 操作數據

 #region 這裡聲明有關數據操作的必要參數
 //當前所使用的數據庫連接

 protected OleDbConnection conn;

 //當前所使用的命令對象
 protected OleDbCommand cmd = new OleDbCommand();

 //當前所使用的數據庫適配器
 protected OleDbDataAdapter da;

 //當前的SQL語句
 public string sqlCmd = string.Empty;

 //當前操作所涉及的數據庫表名
 public string tableName = string.Empty;

 //SQL條件
 public string ConditionExpress;

 //用於存放從數據庫中取得的數據記錄
 protected DataTable dt;
 #endregion

 /// <summary>
 /// 根據當前alFieldItem數組中存儲的字段/值向指定表中添加一條記錄。返回自動增長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() + ",";
 }
 //分別去掉,
 this.sqlCmd = Input.CutComma(this.sqlCmd) + ")" + Input.CutComma(temValue) + ")";

 //聲明執行語句
 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>
 /// 根據當前alFieldItem數組中存儲的字段/值和條件表達式所指定的條件來更新數據庫中的記錄，返回受影響的行數
 /// </summary>
 /// <param name="_tableName">更新的數據表名稱</param>
 /// <returns>返回此次操作所影響的數據行數</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;

 }

 /// 返回查詢結果DataTable
 public DataTable GetDataTable()
 {
 DataSet ds = this.GetDataSet();
 return ds.Tables[0];
 }

 /// <summary>
 /// 根據當前指定的SqlCmd獲取DataSet，如果條件表達式不為空則會被清空，
 /// 所以條件表達式必須包含在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>
 /// 產生OleDbCommand對象所需的參數
 /// </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
 {
 //每個綁定控件都以object的形式被存儲的
 public object obj;

 //綁定到數據庫的字段名稱
 public string field;

 //是否是字符串類型
 public bool isStringType;

 /// <summary>
 /// 構造函數
 /// </summary>
 /// <param name="_o">需要綁定的控件對象</param>
 /// <param name="_field">綁定到的數據表字段名稱</param>
 /// <param name="_isStringType">是否是字符串類型</param>
 public BinderItem(object _obj, string _field, bool _isStringType)
 {
 this.obj = _obj;
 this.field = _field;
 this.isStringType = _isStringType;
 }

 /// <summary>
 /// 根據控件類型獲得控件的值
 /// </summary>
 /// <returns></returns>
 public string GetValue()
 {
 //字符串類型
 if (obj is String)
 {
 return (string)obj;
 }

 //下拉框
 if (obj is DropDownList)
 {
 DropDownList dd = (DropDownList)obj;
 return dd.SelectedValue;
 }

 //多選框
 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;
 }

 //單選組
 if (obj is RadioButtonList)
 {
 RadioButtonList rb = (RadioButtonList)obj;
 return rb.SelectedValue;
 }
 return string.Empty;
 }

 /// <summary>
 /// 根據控件類型設定控件的值
 /// </summary>
 /// <param name="_value">要設定的值</param>
 public void SetValue(string _value)
 {
 //字符串類型
 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;
 }

 //單選按鈕
 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>
 /// 數據表中的字段屬性：字段名，字段值
 /// </summary>
 public class DbKeyItem
 {
 /// <summary>
 /// 字段名稱
 /// </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;
 }

 //單選按鈕
 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>
 /// 數據表中的字段屬性：字段名，字段值
 /// </summary>
 public class DbKeyItem
 {
 /// <summary>
 /// 字段名稱
 /// </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();
 }
 }
}