/// <summary>
/// 读取数据（从数据库）
/// </summary>
private void Select()
{
//执行数据读取并赋予相应的参数
string CommandText = this.CurLayoutState.SelectSql;
//如果未定义SELECT语句，则不执行数据的读取
if (CommandText == null)
{
return;
}
if (CommandText.Length > 0 && CommandText[0] == '@') //若第一个字符为'@'，则代表是存储过程
{
this.DbCommand.CommandText = CommandText.Substring(1);
this.DbCommand.CommandType = CommandType.StoredProcedure;
}
else
{
this.DbCommand.CommandText = CommandText;
this.DbCommand.CommandType = CommandType.Text;
}
this.DbCommand.CommandText = this.ExplainArgument(this.DbCommand.CommandText);
try
{
this.AppendParameters();
IDataReader myReader = this.DbCommand.ExecuteReader();
this.DbCommand.CommandType = CommandType.Text;
if (myReader.Read())
{
this._Catch = 1;
for (int index = 0; index < myReader.FieldCount; index++)
{
FieldAttrib myFieldAttrib = this.Fields[myReader.GetName(index)];
if (myFieldAttrib == null)
{
myFieldAttrib = new FieldAttrib(myReader.GetName(index), System.Data.DbType.String);
this.Fields.Append(myFieldAttrib);
}
myFieldAttrib.GetParameter().Value = myReader[index];
}
this.CallEventFunction(this.OnAfterOperate, Operate.Select);
if (myReader.Read())
{
this._Catch = 2;
this.ErrorMsg = "读取数据：错误，查询结果不唯一！";
}
}
else
{
this._Catch = 0;
}
myReader.Close();
}
catch (Exception e)
{
this.ErrorMsg = "读取数据：" + e.Message;
}
}
/// <summary>
/// 增加参数
/// </summary>
internal void AppendParameters()
{
this.DbCommand.Parameters.Clear();
switch (this.DbConType) //根据数据链接类型判断如何增加参数
{
case "OdbcConnection":
case "OleDbConnection":
this.DbCommand.CommandText = FindArgument.Replace(this.DbCommand.CommandText, new MatchEvaluator(this.ReplaceSub));
break;
default:
foreach (Match myMatch in FindArgument.Matches(this.DbCommand.CommandText))
{
string Item = myMatch.Value;
if (Item[0] != '@')
{
continue;
}
FieldAttrib myFieldAttrib = this.Fields[Item.TrimStart('@')];
if (myFieldAttrib == null)
{
throw new ReportException("无法获取参数" + Item);
}
IDbDataParameter myParameter = myFieldAttrib.GetParameter();
if (!this.DbCommand.Parameters.Contains(myParameter))
{
this.DbCommand.Parameters.Add(myParameter);
}
}
break;
}
}
/// <summary>
/// 根据寻找到的参数，增加实际的值ss
/// </summary>
/// <param name="myMatch"></param>
/// <returns></returns>
private string ReplaceSub(Match myMatch)
{
string Item = myMatch.Value;
if (Item[0] != '@')
{
return(Item);
}
FieldAttrib myFieldAttrib = this.Fields[Item.TrimStart('@')];
if (myFieldAttrib == null)
{
throw new ReportException("无法获取参数" + Item);
}
IDbDataParameter myParameter = myFieldAttrib.GetParameter();
if (this.DbCommand.Parameters.Contains(myParameter))
{
this.DbCommand.Parameters.Add(this.CopyParameter(myParameter));
}
else
{
this.DbCommand.Parameters.Add(myParameter);
}
return("?");
}
/// <summary>
/// 增加一个属性
/// </summary>
/// <param name="newValue">新属性</param>
public void Append(FieldAttrib newValue)
{
if (newValue.Name != null)
{
newValue.Group = this;
this.myHashtable.Add(newValue.Name.ToLower(), newValue);
}
}
/// <summary>
/// 读取新赋予的值
/// </summary>
/// <param name="FieldName">字段名</param>
/// <returns></returns>
public object GetNewValue(string FieldName)
{
FieldAttrib myFieldAttrib = this.Fields[FieldName];
if (myFieldAttrib == null)
{
return(null);
}
else
{
return(myFieldAttrib.GetParameter().Value);
}
}
/// <summary>
/// 读取数据库中先前存在的值
/// </summary>
/// <param name="FieldName">字段名</param>
/// <returns></returns>
public object GetOldValue(string FieldName)
{
FieldAttrib myFieldAttrib = this.Fields[FieldName];
if (myFieldAttrib == null)
{
return(null);
}
else
{
return(myFieldAttrib.OldValue);
}
}
/// <summary>
/// 重置所有的值，只在更新状态和删除状态中才有效
/// </summary>
public void ResetFieldValues()
{
if (this.IsPostBack && this.IsUpdateState)
{
foreach (string Key in this.Fields.GetKeys())
{
FieldAttrib myFieldAttrib = this.Fields[Key];
if (!myFieldAttrib.IsKey)
{
myFieldAttrib.GetParameter().Value = myFieldAttrib.OldValue;
}
}
}
}
/// <summary>
/// 设置指定字段的值
/// </summary>
/// <param name="FieldName"></param>
/// <param name="Value"></param>
/// <returns></returns>
public void SetNewValue(string FieldName, object Value)
{
FieldAttrib myFieldAttrib = this.Fields[FieldName.ToLower()];
if (myFieldAttrib == null)
{
throw new ReportException("字段" + FieldName + "在细节屏字段集合中不存在！");
}
myFieldAttrib.GetParameter().Value = Value;
myFieldAttrib.IsUpdated = true;
if (myFieldAttrib.IsKey)
{
this.RefreshKeyFlag = true;
}
}
/// <summary>
/// 在更新、删除记录之前，首先读取数据库中已经存在的值。
/// </summary>
private bool GetOldValues()
{
//执行数据读取并赋予相应的参数
string CommandText = this.CurLayoutState.SelectSql;
//如果未定义SELECT语句，则不执行数据的读取
if (CommandText == null)
{
return(false);
}
if (CommandText.Length > 0 && CommandText[0] == '@') //若第一个字符为'@'，则代表是存储过程
{
this.DbCommand.CommandText = CommandText.Substring(1);
this.DbCommand.CommandType = CommandType.StoredProcedure;
}
else
{
this.DbCommand.CommandText = CommandText;
this.DbCommand.CommandType = CommandType.Text;
}
IDataReader myReader = null;
try
{
this.AppendParameters();
myReader = this.DbCommand.ExecuteReader();
if (myReader.Read())
{
for (int index = 0; index < myReader.FieldCount; index++)
{
string Key = myReader.GetName(index);
FieldAttrib myFieldAttrib = this.Fields[Key];
myFieldAttrib.OldValue = myReader[Key];
}
}
}
catch
{
return(false);
}
finally
{
myReader.Close();
}
return(true);
}
/// <summary>
/// 向客户端输出信息
/// </summary>
/// <param name="writer"></param>
protected override void Render(System.Web.UI.HtmlTextWriter writer)
{
LayoutState myLayout = null;
if (this.ErrorMsg == null)
{
//检测布局
if (this.Layouts == null)
{
this.ErrorMsg = "输出页面布局：尚未定义页面布局！";
}
myLayout = this.Layouts[this.Layout];
if (myLayout == null)
{
if (this.Layout == null)
{
this.ErrorMsg = "输出页面布局：尚未定义页面布局，或未给页面布局赋予名字！";
}
else
{
this.ErrorMsg = "输出页面布局：不存在指定的页面布局" + this.Layout;
}
}
}
if (this.ErrorMsg != null)
{
if (this.Request.UserHostAddress == "127.0.0.1" || this.Request.UserHostName == System.Net.Dns.Resolve(System.Net.Dns.GetHostName()).AddressList[0].ToString())
{
writer.Write(this.CreateErrorButton(this.ErrorMsg));
}
else
{
writer.Write(this.CreateErrorButton(""));
}
return;
}
//输出样式表
writer.Write(this.GetStyle());
//向客户端输出代码
writer.Write("<span id=ReportDetail_");
writer.Write(this.ClientID);
writer.Write(">");
if (this.Content == null)
{
this.Content = this.GetContent();
}
writer.Write(this.Content);
writer.Write("</span>");
//构造一段Javascript脚本，并发送到客户端，用于给各字段赋值
System.Text.StringBuilder myScript = new System.Text.StringBuilder();
myScript.Append("<script language = javascript>\n");
myScript.Append("var ?clientId?_arrValues = new Array(\n".Replace("?clientId?", this.ClientID));
bool IsExist = false;
foreach (object Key in this.Fields.GetKeys())
{
FieldAttrib myFieldAttrib = this.Fields[Key.ToString()];
IDbDataParameter myParameter = myFieldAttrib.GetParameter();
//获取字段值
object Value = myFieldAttrib.TrueValue;
if (Tools.IsNull(Value))
{
Value = null;
}
else if (Value is string) //支持UBB代码的转换
{
if (myFieldAttrib.IsSupportUBB && myLayout.IsSupportUBB)
{
Value = this.UBB.GetHtmlCode(Value as string);
}
}
myScript.Append("new Array('");
myScript.Append(Key); //字段名
myScript.Append("', '");
myScript.Append(Value == null?null:Value.ToString().Replace("'", @"\'").Replace("\r\n", @"\n")); //值
myScript.Append("', '");
myScript.Append(myFieldAttrib.IsKey); //是否为主键
myScript.Append("', '");
myScript.Append(myFieldAttrib.DbType); //字段类型
myScript.Append("', '");
myScript.Append(myFieldAttrib.Size); //字段长度
myScript.Append("', '");
myScript.Append(myFieldAttrib.IsNullable); //是否允许为空
myScript.Append("', '");
myScript.Append(myFieldAttrib.Verification == null?null:myFieldAttrib.Verification.Replace("'", @"\'").Replace("\r\n", @"\n").Replace(@"\", @"\\")); //验证码
myScript.Append("', '");
myScript.Append(myFieldAttrib.ErrorMsg == null?null:myFieldAttrib.ErrorMsg.Replace("'", @"\'").Replace("\r\n", @"\n")); //错误信息
myScript.Append("', '");
myScript.Append(myFieldAttrib.Title.Replace("'", @"\'").Replace("\r\n", @"\n")); //别名
myScript.Append("', '");
myScript.Append(myFieldAttrib.IsSupportUBB); //是否支持UBB代码
myScript.Append("', '");
myScript.Append(myFieldAttrib.FormatString == null?null:myFieldAttrib.TrueFormatString.Replace("'", @"\'")); //格式化字符串
myScript.Append("', '");
myScript.Append(myFieldAttrib.IsUpdateable); //是否允许更改
myScript.Append("'),\n");
IsExist = true;
}
if (IsExist == true)
{
myScript[myScript.Length - 2] = '\n';
}
myScript.Append(");\n");
myScript.Append("try{var ?clientId? = new ReportDetailOperate('?clientId?', ?clientId?_arrValues);\n".Replace("?clientId?", this.ClientID));
myScript.Append("ReportDetailSetValue('?clientId?', ?clientId?_arrValues);\n".Replace("?clientId?", this.ClientID));
myScript.Append("}catch(e){}</script>\n");
writer.Write(myScript.ToString());
}
