CN103218230A - Method for dynamically creating entity class under frame of Silverlight - Google Patents

Abstract

The invention provides a method for a dynamically creating entity class under a frame of Silverlight. According to the method, a data table type sequence not supported by the Silverlight is transformed to a character string type sequence supported by the Silverlight through the method of sequence transformation at a WCF side. The method comprises the steps: (1) a data table is serialized to be a character string through a server side and transmitted to a Silverlight side through the WCF after compression; (2) the character string is decoded and uncompressed at the Silverlight side, the uncompressed character string is analyzed so that Observable Collection (dynamic) is obtained, wherein the dynamic is of a dynamic type, and data of the data table are stored through the Observable Collection (dynamic); and (3) according to analyzed information, a case is dynamically established and assigned so that transformation of the character string type sequence is achieved, and at last the transformed character string type sequence is returned to the Silverlight side for use.

Description

The method of dynamic creation entity class under a kind of silverlight framework

Technical field

The present invention relates to the Computer Applied Technology field, the method for dynamic creation entity class under specifically a kind of silverlight framework.

Background technology

DataTable is the grid Virtual table of temporarily preserving data, it need not code simple binding data storehouse just.We know that what store in the database is entity list, has a series of data in the entity list.And DataTable promptly is stored in the table in the internal memory, before being persisted to database, can not exert an influence to database.In the project exploitation, often to use DataTable, proper if DataTable uses, can not only make program succinctly practical, and can improve performance, reach the effect of getting twice the result with half the effort.DataTable also has many methods, as: 1. obtain DataTable by constructed fuction; 2. obtain DataTable by DataSet; 3. pass through the structure of the self-defined DataTable of DataRow; 4. obtain new DataTable by existing DataTable; 5. fill DataTable by DataAdapter; 6. import DataTable by the DataRow array.

Silverlight does not support datatable, needs developer oneself definition entity class usually, datatable is converted into entity class offers the use of silverlight end, and is very big for the IT system development effortsIT amount like this, and is not easy to management.The innovation achievement is based on and improves silverlight development efficiency, is implemented in through research and does not define entity under the silverlight, sends the DataTable data to the silverlight use by creating regime type.

Summary of the invention

The method that the purpose of this invention is to provide dynamic creation entity class under a kind of silverlight framework.

The objective of the invention is to realize in the following manner, at the WCF end, the method by sequence transforms is converted into the character string type that silverlight supports with the unsupported datatable type sequence of silverlight, and concrete steps are as follows:

1) at first server end changes into character string to the datatable sequence, and the compression back is delivered to the silverlight end by WCF;

2) decompress by decoding at the silverlight end, character string after decompressing is resolved, generate ObservableCollection＜dynamic 〉, wherein dynamic is a regime type, by ObservableCollection＜dynamic〉deposit the Datatable data;

3) according to the information of resolving, the dynamic creation example is the example assignment also, realizes the conversion of character string type, returns to the silverlight end at last and uses.

Excellent effect of the present invention: the Silverlight technological frame is not supported the datatable technology, usually need developer oneself definition entity class, datatable is converted into entity class offers the use of silverlight end, very big for the IT system development effortsIT amount like this, and be not easy to management.The present invention is based on and improves silverlight development efficiency, be implemented in and do not define entity under the silverlight, send the DataTable data to the silverlight use by creating regime type, having liberated developer oneself definition entity class and datatable is converted into entity class provides silverlight the coding work amount that end uses, and has improved developer's work efficiency greatly.

Description of drawings

Fig. 1 is WCF end realization flow figure;

Fig. 2 is WCFSilverlight end realization flow figure.

Embodiment

Explain below with reference to Figure of description method of the present invention being done.

Embodiment

End:

1, at first, the DataTable sequence is turned to string, information such as table name, row name are kept in the string string, partial code is as follows:

Private?static?string?SerializeDataTable（Datatable?dt,int?ipIndex）

{

Try

{

StringBuilder?strResult=new?StringBuilder()

String?strTableName=””;

StrtablName=dt.TableName;

If?(strTableName==””)

StrtablName=“TABLENAME_”+ipIndex,?ToString();

strResult.Appdend(“▲”);

for(int?s=0:s<dt.Columns.Count:s++)

strResult.Appdend(dt.Columns[s].ColumnName);

2, will obtain character string and carry out encoding compression:

Byte[]bytes=System.Text.Encoding.UTF8.GetBytes(str);

Byte[]bR=Utils.Compress(bytes);

Return?System.Convert.ToBase64String(bR)

The Silverlight end:

At first,, the character string parsing behind the decompress(ion) is obtained table name with the character string decompression of decoding, the row name, information such as row type, partial code is as follows:

String[]?listMain=strDe.Split(‘▲’);

lsttableName[i]=listMain[0];

DicDy[lsttableName[i]=lstdy[i];

strTemp=listMain[1];

string[]?listField=strTemp.Split(‘■’);

listFieldNamelst[i]=listField[0];

DicFieldName[lsttableName=listFieldType[0];.Split(‘▼’);

strTemp=listField[1];

strTemp?[]listFieldType=strTemp.split(‘□’);

lstFieldTypelst[i]=listFieldType[0];

DicFiledType[lsttbleName[0].split(‘?▼’);

For?(int?j=0:j<FildName.length:j++)

2, according to the information creating dynamic instance of resolving, be the example assignment, partial code is as follows:

For?(int?s=0:s<listRow.length:s++)

{

Dynamic?myClass=Activator.CreateInstans(MyTape);

String[]col=listRow[s].Split(‘?▼’);∣

For(int?j=0:j<col.length:j++)

{

String?strTran=col[j];

If?(FileldType[j]==”System.String”)

{

strTran=UnStrReplace(col[j]);

}

Object?0Data=TranStrT0object(strTran,FildType[j]);

MyClassProperty.SetValue(myClass,0Data,null);

}

obList.Add(myClass);

3, create ObservableCollection＜dynamic〉example and return for the silverlight end and call.

Except that the described technical characterictic of instructions, be the known technology of those skilled in the art.

Claims (1)

1. the method for dynamic creation entity class under the silverlight framework, it is characterized in that holding at WCF, method by sequence transforms is converted into the character string type that silverlight supports with the unsupported datatable type sequence of silverlight, and concrete steps are as follows:

1) at first server end changes into character string to the datatable sequence, and the compression back is delivered to the silverlight end by WCF;

2) decompress by decoding at the silverlight end, character string after decompressing is resolved, generate ObservableCollection＜dynamic 〉, wherein dynamic is a regime type, by ObservableCollection＜dynamic〉deposit the Datatable data;

3) according to the information of resolving, the dynamic creation example is the example assignment also, realizes the conversion of character string type, returns to the silverlight end at last and uses.

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