Form binding class, use reflection to bind entity classes and controls

Using system; <br/> using system. web; <br/> using system. web. ui; <br/> using system. web. UI. htmlcontrols; <br/> using system. web. UI. webcontrols; <br/> using system. reflection; </P> <p> // ============================< br/>/ /author: dy <br/> // Date: 20080329 <br/> // ==========================< br/> namespace BLL <BR/>{< br/> /// <summary> <br/> // description: use reflection to bind business objects and controls <br/> // this class has two static methods <see CREF = "bindobjecttocontro Ls "/> and <see CREF =" bindcontrolstoobject "/> <br/> // used to bind control values or object attributes <see CREF =" control "/> <br/> /// the Control ID must be the same as the property name of the Business Object <br/> /// </Summary> <br/> public class formbinding <br />{< br/> /// <summary> <br/> // bind the object property value to the control with the same name <see CREF = "control"/> <br/> /// </Summary> <br/> /// <Param name = "OBJ"> property: the object to which the form control is bound </param> <br/> // /<Param name = "Container"> the control container is usually a page </param> <br/> Public sta TIC void bindobjecttocontrols (Object OBJ, control container) <br/>{< br/> If (OBJ = NULL) return; </P> <p> // obtain the business object attributes <br/> // <br/> type objtype = obj. getType (); <br/> propertyinfo [] objpropertiesarray = objtype. getproperties (); </P> <p> foreach (propertyinfo objproperty in objpropertiesarray) <br/>{</P> <p> control = container. findcontrol (objproperty. name); </P> <p> // list control (dropdownlist, c Heckboxlist, radiobuttonlist) <br/> // <br/> If (control is listcontrol) <br/>{< br/> listcontrol = (listcontrol) control; <br/> foreach (listitem litem in listcontrol. items) <br/>{< br/> litem. selected = false; <br/>}< br/> string propertyvalue = objproperty. getvalue (OBJ, null ). tostring (); <br/> string [] S = propertyvalue. split (','); <br/> foreach (string I in S) <br/>{< br/> listi TEM listitem = listcontrol. Items. findbytext (I); <br/> If (listitem! = NULL) listitem. Selected = true; <br/>}</P> <p >}< br/> else if (control! = NULL) <br/>{< br/> // obtain control attributes <br/> // <br/> type controltype = control. getType (); <br/> propertyinfo [] controlpropertiesarray = controltype. getproperties (); </P> <p> // <br/> // test common attributes <br/> bool success = false; <br/> success = findandsetcontrolproperty (OBJ, objproperty, control, controlpropertiesarray, "checked", typeof (bool); </P> <p> If (! Success) <br/> success = findandsetcontrolproperty (OBJ, objproperty, control, controlpropertiesarray, "selecteddate", typeof (datetime); </P> <p> If (! Success) <br/> success = findandsetcontrolproperty (OBJ, objproperty, control, controlpropertiesarray, "value", typeof (string); </P> <p> If (! Success) <br/> success = findandsetcontrolproperty (OBJ, objproperty, control, controlpropertiesarray, "text", typeof (string); </P> <p> If (! Success) <br/> success = findandsetcontrolproperty (OBJ, objproperty, control, controlpropertiesarray, "innerhtml", typeof (string )); </P> <p >}< br/>}</P> <p> // <summary> <br/> // query Control attribute and type, and try to assign a value to the property of the same name of the Business Object <br/> /// </Summary> <br/> // <Param name = "OBJ"> the property is found. </param> <br/> /// <Param name = "objproperty"> Properties of the object </param> <br/> // <Param name = "control"> control that matches the Control ID and Business Object Property name </param> <br/> /// <Param name = "controlpropertiesarray"> Control attribute set </param> <br/> // <Param name = "propertyname"> name of the control attribute to be set </param> <br/> /// <Param name = "type"> control property type correction </param> <br/> /// <returns> whether the property is found and set </returns> <br/> Private Static bool findandsetcontrolproperty (Object OBJ, propertyinfo objproperty, control, propertyinfo [] controlpropertiesarray, string propertyname, type) <br/>{< br/> // Traverse Control attributes <br/> // <Br/> foreach (propertyinfo controlproperty in controlpropertiesarray) <br/>{< br/> // check the property name and type <br/> // <br/> If (controlproperty. name = propertyname & controlproperty. propertytype = type) <br/>{< br/> // set the value of the control property to the Business Object <br/> // <br/> controlproperty. setvalue (control, convert. changetype (objproperty. getvalue (OBJ, null), type), null); <br/> return true; <br/>}< br/> return false; <Br/>}</P> <p> // <summary> <br/> // set the S Value of the control to business. <see CREF = "control"/> object <br/> /// </Summary> <br/> // <Param name = "OBJ"> business object to be bound </param> <br/> /// <Param name = "Container"> Control container </param> <br/> Public static void bindcontrolstoobject (Object OBJ, control container) <br/>{< br/> If (OBJ = NULL) return; </P> <p> // obtain the attributes of a Business Object <br/> // <br/> type objtype = obj. getType (); <br/> propertyinfo [] objpropertie Sarray = objtype. getproperties (); </P> <p> foreach (propertyinfo objproperty in objpropertiesarray) <br/>{</P> <p> control = container. findcontrol (objproperty. name); <br/> If (control is listcontrol) <br/>{< br/> listcontrol = (listcontrol) control; <br/> string STR = ""; <br/> If (listcontrol. selecteditem! = NULL) </P> <p> for (INT I = 0; I <listcontrol. items. count; I ++) <br/>{< br/> If (listcontrol. items [I]. selected) <br/>{< br/> STR + = listcontrol. items [I]. text + ","; <br/>}< br/> objproperty. setvalue (OBJ, convert. changetype (STR, objproperty. propertytype), null); </P> <p >}< br/> else if (control is htmlinputhidden) <br/>{</P> <p> try <br/>{< br/> htmlinputhidden hidcontrol = (htmlinputhidde N) control; <br/> // hidcontrol. value = hidcontrol. value = ""? "0": hidcontrol. value; <br/> objproperty. setvalue (OBJ, convert. changetype (hidcontrol. value, objproperty. propertytype), null ); <br/>}< br/> catch <br/>{</P> <p >}< br/> else if (control is htmlinputtext) <br/>{</P> <p> try <br/>{< br/> htmlinputtext txtcontrol = (htmlinputtext) control; <br/> // txtcontrol. value = txtcontrol. value = ""? "0": txtcontrol. value; <br/> objproperty. setvalue (OBJ, convert. changetype (txtcontrol. value, objproperty. propertytype), null ); <br/>}< br/> catch <br/>{</P> <p >}< br/>}</P> <p> else if (control! = NULL) <br/>{< br/> // obtain control attributes <br/> // <br/> type controltype = control. getType (); <br/> propertyinfo [] controlpropertiesarray = controltype. getproperties (); </P> <p> // try common attributes <br/> // <br/> bool success = false; <br/> success = findandgetcontrolproperty (OBJ, objproperty, control, controlpropertiesarray, "checked", typeof (bool); </P> <p> If (! Success) <br/> success = findandgetcontrolproperty (OBJ, objproperty, control, controlpropertiesarray, "selecteddate", typeof (datetime); </P> <p> If (! Success) <br/> success = findandgetcontrolproperty (OBJ, objproperty, control, controlpropertiesarray, "value", typeof (string); </P> <p> If (! Success) <br/> success = findandgetcontrolproperty (OBJ, objproperty, control, controlpropertiesarray, "text", typeof (string )); <br/>}</P> <p> /// <summary> <br/> // query the control value and try assign a value to the Business Object Property of the same name <br/> /// </Summary> <br/> /// <Param name = "OBJ"> to be business Object </param> <br/> // <Param name = "objproperty"> Business Object Attributes </param> <br/> // <Param name = "control"> controls with the same name </param> <br/> // <Param name = "controlpropertiesarray"> control array </param> <br/> // <param name = "propertyname"> the obtained control property name </param> <br/> // <Param name = "type"> control property type </param> <br />/// <returns> whether the property is found </returns> <br/> Private Static bool findandgetcontrolproperty (Object OBJ, propertyinfo objproperty, control, propertyinfo [] controlpropertiesarray, string propertyname, type) <br/> {<br/> // Traverse Control attributes <br/> // <br/> foreach (propertyinfo controlproperty in controlpropertiesarray) <br/>{< br/> // check the name and type <br/> // <br/> If (controlproperty. name = propertyname & controlproperty. propertytype = typeof (string )) <br/> {<br/> // control is assigned to the Business Object <br/> // <br/> try <br/> {<br/> Object ctrvalue = convert. changetype (controlproperty. getvalue (control, null), objproperty. propertytype); <br/> objproperty. setvalue (OBJ, ctrvalue, null); </P> <p> return true; <br/>}< br/> catch <br/> {<br/> // The Business Object Property corresponding to the control is not found. <br/> return false; <br/>}< br/> return false; <br/>}< br/>

The attributes of the object class are the same as those of the control ID.

Call time

Assign a value to the control by the object class: Bll. formbinding. bindobjecttocontrols (model, this); // model is the object class.

Value. The value of the control is assigned to the object class: Bll. formbinding. bindcontrolstoobject (model, this );

Complete the value and value assignment in one sentence.