这一节，我们给Web part增加报表查询参数。为了演示，这里只增加两个查询参数：开始时间和结束时间。这两个参数都是日期型的数据，为了方便用户操作，我使用了client端的日历脚本来实现日期输入。
与上一节相比，我们需要增加两部分工作
第一步：构造日期输入控件
我的页面布局大概是这样的：
From [_txtStartDate] [_btnStartDate]To [_txtStartDate] [_btnEndDate][_cmdOK] 参数输入区报表显示区状态来栏
为了加入参数，我在构造函数里创建了一组table，将控件分别加入到各单元格中。
下面为代码
protected string _reportServerURL = "" ; // = "http://ctc-bar:81/ReportServer/ReportService.asmx";
protected string _reportPath = "" ; // = "/BARreports/EBCdetailList";
// UI controls
protected HtmlInputText _txtStartDate = BuildTextBox( "txtStartDate" ); protected HtmlButton _btnStartDate = new HtmlButton (); protected HtmlInputText _txtEndDate = BuildTextBox( "txtEndDate" ); protected HtmlButton _btnEndDate = new HtmlButton (); protected Button _cmdOK = new Button (); protected HtmlGenericControl ReportView = new HtmlGenericControl (); protected Label _lblStatus = new Label (); protected Label _lblError = new Label (); protected HtmlInputHidden ctrlPrefix = new HtmlInputHidden (); protected string canlander_JSP = "" ;
#region
{
canlander_JSP = BARreportWebPart.Properties.
initailize the web controls public BARreportWebPartClass() Resources .Canlander_JSP; //<input type=hidden id="ctrlPrefix" name="ctrlPrefix" value='<asp:Literal Runat=server ID=ctrlPrefix></asp:Literal>'>
ctrlPrefix.ID =
ctrlPrefix.Name =
ctrlPrefix.Value =
WebPart_Load();
}
"ctrlPrefix" ; "ctrlPrefix" ; "<asp:Literal Runat=server ID=ctrlPrefix></asp:Literal>" ; /// <summary>
/// load the web part UI controls
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
{
protected void WebPart_Load() // build up the table that is our UI
Label ParameterName; TableRow tr; TableCell cell; //build the main table
t2.ID =
t2.CssClass =
t2.Width =
t2.Height =
Table t2 = new Table (); "TblMain" ; "mainTable" ; new Unit (100, UnitType .Percentage); new Unit (100, UnitType .Percentage); //add the top table
tr =
tr.ID =
t2.Rows.Add(tr);
cell =
cell.ID =
t2.Rows[0].Cells.Add(cell);
t2.Rows[0].Cells[0].VerticalAlign =
t2.Rows[0].Cells[0].HorizontalAlign =
new TableRow (); "TblMainRow1" ; new TableCell (); "TblMainRow1Cell1" ; VerticalAlign .Middle; HorizontalAlign .Left; //add the content table
t2.Rows.Add(
t2.Rows[1].Cells.Add(
t2.Rows[1].Cells[0].VerticalAlign =
t2.Rows[1].Cells[0].HorizontalAlign =
new TableRow ()); new TableCell ()); VerticalAlign .Middle; HorizontalAlign .Left; //add the bottom table
t2.Rows.Add(
t2.Rows[2].Cells.Add(
t2.Rows[2].Cells[0].VerticalAlign =
t2.Rows[2].Cells[0].HorizontalAlign =
Controls.Add(t2);
new TableRow ()); new TableCell ()); VerticalAlign .Middle; HorizontalAlign .Left; /// build top table
tblTop.ID =
tblTop.Width =
tblTop.Height =
tr =
tr.ID =
tblTop.Rows.Add(tr);
cell =
cell.ID =
tblTop.Rows[0].Cells.Add(
tblTop.Rows[0].Cells[0].VerticalAlign =
tblTop.Rows[0].Cells[0].HorizontalAlign =
ParameterName =
ParameterName.Text =
_txtStartDate.Attributes.Add(
_btnStartDate.ID =
_btnStartDate.InnerText =
Table tblTop = new Table (); "TblTop" ; new Unit (100, UnitType .Percentage); new Unit (100, UnitType .Percentage); new TableRow (); "TblTopRow1" ; new TableCell (); "TblTopRow1Cell1" ; new TableCell ()); VerticalAlign .Middle; HorizontalAlign .Center; new Label (); "From" ; "ondblclick" , "show_cele_date(this,'','',this)" ); "btnStartDate" ; "Calendar" ; //_btnStartDate.Attributes.Add("onclick", "show_cele_date(this,'','',document.getElementById('" + ClientID_txtStartDate + "'))");
tblTop.Rows[0].Cells[0].Controls.Add(ParameterName);
tblTop.Rows[0].Cells[0].Controls.Add(_txtStartDate);
tblTop.Rows[0].Cells[0].Controls.Add(_btnStartDate);
tblTop.Rows[0].Cells.Add(
tblTop.Rows[0].Cells[1].VerticalAlign =
tblTop.Rows[0].Cells[1].HorizontalAlign =
ParameterName =
ParameterName.Text =
_txtEndDate.Attributes.Add(
_btnEndDate.InnerText =
_btnEndDate.Attributes.Add(
tblTop.Rows[0].Cells[1].Controls.Add(ParameterName);
tblTop.Rows[0].Cells[1].Controls.Add(_txtEndDate);
tblTop.Rows[0].Cells[1].Controls.Add(_btnEndDate);
tblTop.Rows.Add(
tblTop.Rows[1].Cells.Add(
tblTop.Rows[1].Cells[0].VerticalAlign =
tblTop.Rows[1].Cells[0].HorizontalAlign =
_cmdOK.Text =
tblTop.Rows[1].Cells[0].Controls.Add(_cmdOK);
_cmdOK.Click +=
new TableCell ()); VerticalAlign .Middle; HorizontalAlign .Center; new Label (); "To" ; "ondblclick" , "show_cele_date(this,'','',this)" ); "Calendar" ; "onclick" , "show_cele_date(this,'','',GetObject('" + _txtEndDate.ClientID + "'))" ); new TableRow ()); new TableCell ()); VerticalAlign .Middle; HorizontalAlign .Center; "View Report" ; new EventHandler (OnOKClick); //add the top table into table main
t2.Rows[0].Cells[0].Controls.Add(tblTop);
//build bottom table
tblBottom.Width =
tblBottom.Height =
tblBottom.Rows.Add(
tblBottom.Rows[0].Cells.Add(
tblBottom.Rows[0].Cells[0].VerticalAlign =
tblBottom.Rows[0].Cells[0].HorizontalAlign =
_lblStatus.Text =
tblBottom.Rows[0].Cells[0].Controls.Add(_lblStatus);
Table tblBottom = new Table (); new Unit (100, UnitType .Percentage); new Unit (100, UnitType .Percentage); new TableRow ()); new TableCell ()); VerticalAlign .Middle; HorizontalAlign .Center; "" ; //add the bottom table into main table
t2.Rows[2].Cells[0].Controls.Add(tblBottom);
//build the content table
Table tblContent = new Table (); //Step 1:
tblContent.Rows.Add(
tblContent.Rows[0].Cells.Add(
ReportView.InnerText =
tblContent.Rows[0].Cells[0].Controls.Add(ReportView);
new TableRow ()); new TableCell ()); "report view region" ; //add the content table into main table
t2.Rows[1].Cells[0].Controls.Add(tblContent);
Controls.Add(ctrlPrefix);
}
/// <summary>
/// Build a new textbox that has standard props.
/// </summary>
/// <param name="id"> The id for the textbox. </param>
/// <returns> A TextBox </returns>
{
t.ID = id;
}
private static HtmlInputText BuildTextBox( string id) HtmlInputText t = new HtmlInputText (); return t;#endregion
第二步：注册javascript脚本来实现日历输入。
为了更加友好的用户操作，需要利用javascript来实现日期输入。javascript脚本很长，所以我把脚本保存在资源文件中，这样，对脚本的修改大大方便了。具体原理参见我的另一篇文章http://blog.csdn.net/yanwei100/archive/2007/03/15/1530528.aspx
由于脚本是运行在一个自定义web控件中，所以需要解决ClientID的问题，具体方法参考我的另外一篇文章。
下面是代码
#region
{
RegisterJSP();
regist Java script protected override void OnLoad( EventArgs e) // set ctrlPrefix's value
string name = this .ClientID; string [] elm = ctrlPrefix.ClientID.Split( '_' ); //get an array of values
ctrlPrefix.Value = ctrlPrefix.ClientID.Replace(elm[elm.Length - 1],
"" ); //get the last element and replace from the id
}
{
base .OnLoad(e); void RegisterJSP() //read jsp file from resource
String csname1 = "CalendarScript" ; Type cstype = this .GetType(); // Get a ClientScriptManager reference from the Page class.
ClientScriptManager cs = Page.ClientScript; // Check to see if the client script is already registered.
{
cs.RegisterClientScriptBlock(cstype, csname1, canlander_JSP,
}
if (!cs.IsClientScriptBlockRegistered(cstype, csname1)) false ); //add the getprefix function
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
strbld.Append(
{
cs.RegisterClientScriptBlock(cstype, csname2, strbld.ToString(),
}
}
{
{
{
ClientID_txtStartDate = ctrl.ClientID;
}
{
_btnStartDate = (
}
}
{
_btnStartDate.Attributes.Add(
}
}
StringBuilder strbld = new StringBuilder (); "<script language ='javascript' type='text/javascript' >" ); "function getCrtlPrefix() {" ); "var prefix; " ); "var objCrtlPrefix = document.getElementById('" + ctrlPrefix.ClientID + "');" ); "if (objCrtlPrefix)" ); "prefix = objCrtlPrefix.value;" ); "return prefix;}" ); "function GetObject(ctrlName) {" ); "var prefix = getCrtlPrefix();" ); "var objCrtl = document.getElementById(prefix + ctrlName);" ); "if (objCrtl)" ); "return objCrtl;" ); " else " ); " alert('not found!');} " ); "</script>" ); string csname2 = "getCrtlPrefixScript" ; if (!cs.IsClientScriptBlockRegistered(cstype, csname2)) false ); protected override void OnPreRender( EventArgs e) string ClientID_txtStartDate= "" ; HtmlButton _btnStartDate = null ; foreach ( Control ctrl in Controls[0].Controls[0].Controls[0].Controls[0].Controls[0].Controls[0].Controls) if ( "txtStartDate" == ctrl.ID) if ( "btnStartDate" == ctrl.ID) HtmlButton )ctrl; if ( null != _btnStartDate) "onclick" , "show_cele_date(this,'','',document.getElementById('" + ClientID_txtStartDate + "'))" ); base .OnPreRender(e);#endregion
最后，将用户输入的日期加入到web service的查询参数中：
{
||
{
writer.Write(
}
ReportingServer.
ReportingServer.
{
parameterValues =
{
parameterValues[i] =
parameterValues[i].Name = parameters[i].Name;
parameterValues[i].Label = parameters[i].Prompt;
}
protected override void Render(System.Web.UI. HtmlTextWriter writer) base .Render(writer); if ( string .Empty == ReportServerURL.Trim() || null == ReportServerURL string .Empty == ReportPath.Trim() || null == ReportPath) "please set the ReportServerURL, ReportPath" ); return ; string reportServerURL = ReportServerURL; string reportPath = ReportPath; ReportAdapter rsAdapter = new ReportAdapter (reportServerURL, reportPath); ReportParameter [] parameters = rsAdapter.GetParameters(); ParameterValue [] parameterValues = null ; if (parameters.Length > 0) new ReportingServer. ParameterValue [parameters.Length]; for ( int i = 0; i < parameters.Length; i++) new ReportingServer. ParameterValue (); DateTime startDate = new DateTime ( DateTime .Now.Year, DateTime .Now.Month,1); DateTime endDate = startDate.AddMonths(1); try
{
startDate =
}
DateTime .Parse(_txtStartDate.Value); catch {} try
{
endDate =
}
parameterValues[0].Value = startDate.ToString(
DateTime .Parse(_txtEndDate.Value); catch {} "yyyy-MM-dd" ); //"2007-1-1";parameterValues[1].Value = endDate.ToString(
"yyyy-MM-dd" ) ; //"2007-3-31";parameterValues[2].Value =
parameterValues[3].Value =
parameterValues[4].Value =
}
System.Text.
"0,1,2,3,4,5,6,7,8" ; "Government,Enterprise,Partner,International" ; "Requested,Confirmed,Cancelled,Closed" ; Encoding enc = System.Text. Encoding .UTF8; byte [] result = rsAdapter.RenderReport(parameterValues); string htmlResult = enc.GetString(result); //htmlResult = htmlResult.Replace(reportServerURL.Replace("/ReportService.asmx", "?"), "http://" & Request("SERVER_NAME") & Request("SCRIPT_NAME") & "?Report=");
writer.Write(htmlResult);
}
