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从自定义对象添加新记录并将其显示在visualforce页面上

custom-object apex visualforce apex-code salesforce

vid · 技术社区 · 7 年前

错误:未知属性“tudent\uu cStandardController”。d'

当我将delete commandLink按钮添加到vf页面时,就会发生这种情况。在我添加它之前,它不会显示错误,但不会在页面上显示记录。

提前谢谢你的帮助

    <apex:page standardController="tudent__c" extensions="vidsav">
    <apex:form >
       <apex:outputPanel id="check">
        <apex:pageBlock title="Dodaj Å tudenta">
          <apex:pageBlockSection columns="1">
            <apex:inputField value="{! tudent__c.Name }"/>
            <apex:inputField value="{! tudent__c.priimek__c }"/>
            <apex:inputField value="{! tudent__c.Datum_rojstva__c }"/>
            <apex:inputField value="{! tudent__c.letnik__c }"/>
            <apex:inputField value="{! tudent__c.Naslov__c }"/>
            <apex:inputField value="{! tudent__c.naziv_fakultete__c }"/>
            <apex:inputField value="{! tudent__c.tudijski_program__c }"/>
            <apex:inputField value="{! tudent__c.tip_tudija__c }">
            <apex:actionSupport event="onchange" rerender="check" />
            </apex:inputField>
            <apex:inputField value="{! tudent__c.Samopla_nik__c }" rendered="{!IF( tudent__c.tip_tudija__c == 'izredni', true, false )}" />
          </apex:pageBlockSection>
            <apex:pageBlockButtons >
                <apex:commandButton action="{!save}" value="Save" />
                <apex:commandButton value="Cancel" action="{!cancel}"/>
            </apex:pageBlockButtons>
        </apex:pageBlock>
       </apex:outputPanel>    
    <apex:pageBlock title="Å tudenti">
      <apex:pageBlockTable value="{!studentsR}" var="s" >
       <apex:commandLink action="{!deleteStudent}" onclick="if(!confirm('Are you sure?')) return false;">`enter code here`Del
    <apex:param value="{!d.Id}" name="idToDel" assignTo="{!SelectedStudentId}"/>
</apex:commandLink>
         <apex:column value="{!s.Name}"/>
         <apex:column value="{!s.priimek__c}"/>
         <apex:column value="{!s.Datum_rojstva__c}"/>
         <apex:column value="{!s.letnik__c}"/>
         <apex:column value="{!s.Naslov__c}"/>
         <apex:column value="{!s.naziv_fakultete__c}"/>
         <apex:column value="{!s.tudijski_program__c}"/>
         <apex:column value="{!s.tip_tudija__c}"/>
         <apex:column value="{!s.Samopla_nik__c}"/>
      </apex:pageBlockTable>
    </apex:pageBlock>
    </apex:form>
</apex:page>

public class vidsav {

public vidsav(ApexPages.StandardController controller) {

}

public List<tudent__c> studentsR {get;set;}
public String SelectedStudentId {get;set;}

public vidsav() {
    loadData();

}         

public void loadData() {

    studentsR = [Select id,Name,priimek__c,Datum_rojstva__c,letnik__c,Naslov__c,naziv_fakultete__c,tudijski_program__c,tip_tudija__c,Samopla_nik__c, CreatedDate from tudent__c Order By CreatedDate desc];

}

public void deleteStudent(){

   studentsR = [Select id,Name,priimek__c,Datum_rojstva__c,letnik__c,Naslov__c,naziv_fakultete__c,tudijski_program__c,tip_tudija__c,Samopla_nik__c, CreatedDate from tudent__c where id = :SelectedStudentId];

  if(studentsR.size() > 0 || studentsR[0].Id != ''){

  delete studentsR;

  }

 loadData();

   }

}

2 回复 | 直到 7 年前

Jitender Padda 7 年前

以下是您应该使用的更新代码->

1) 将PageBlockTable更新为此-

<apex:pageBlockTable value="{!studentsR}" var="s" >
     <apex:column value="{!s.Name}"/>
     <apex:column value="{!s.priimek__c}"/>
     <apex:column value="{!s.Datum_rojstva__c}"/>
     <apex:column value="{!s.letnik__c}"/>
     <apex:column value="{!s.Naslov__c}"/>
     <apex:column value="{!s.naziv_fakultete__c}"/>
     <apex:column value="{!s.tudijski_program__c}"/>
     <apex:column value="{!s.tip_tudija__c}"/>
     <apex:column value="{!s.Samopla_nik__c}"/>
     <apex:column>
         <apex:commandLink action="{!deleteStudent}" onclick="if(!confirm('Are you sure?')) return false;" value="Del">
             <apex:param value="{!s.Id}" name="idToDel" assignTo="{!SelectedStudentId}"/>
         </apex:commandLink>
     </apex:column>

你需要把你的 commandLink 顶点内部:列,以便在 pageBlockTable 当然还有 d 必须替换为 s s (var=“s”)。

public class vidsav {

public vidsav(ApexPages.StandardController controller) {
    loadData();
}

public List<Account> studentsR {get;set;}
public String SelectedStudentId {get;set;}      

public void loadData() {

    studentsR = [Select id,Name,priimek__c,Datum_rojstva__c,letnik__c,Naslov__c,naziv_fakultete__c,tudijski_program__c,tip_tudija__c,Samopla_nik__c, CreatedDate from tudent__c Order By CreatedDate desc];

}

public void deleteStudent(){

   studentsR = [Select id,Name,priimek__c,Datum_rojstva__c,letnik__c,Naslov__c,naziv_fakultete__c,tudijski_program__c,tip_tudija__c,Samopla_nik__c, CreatedDate from tudent__c where id = :SelectedStudentId];

    if(studentsR.size() > 0 || studentsR[0].Id != ''){

      delete studentsR;

    }
    loadData();

  }

}

您使用了两个构造函数,并从错误的构造函数中调用loadData(),这就是为什么它没有加载数据。这样,您就可以删除记录并重新加载表。

DSrivastava 7 年前

将{!d.Id}替换为{!s.Id} 用于遍历pageblocktable中记录的变量不是d。