hi, 

i have obj named patient_receipt__c, it has lookup field for patient name, if i select the name and click search it should display the details ..but it is not working and i  don't knw where i did mistake..

my controller:

public class viewrec
{
public String temp;
Public Boolean show{set;get;}
public Patient_Receipt__c pr{get; set;}
Public  list<Patient_Receipt__c>prlst{set;  get;}

    public viewrec()
    {
    
    pr= new Patient_Receipt__c();
    show= false;
    }


    public pageReference fees()
    {
    if(pr.Name__c!= null)
    
    {
    
    temp=pr.Name__c;

   //prlst= (list<Patient_Receipt__c>)[select Name__c,Registration_Number__c,Age__c,Diagnosis_Fees__c,E_C_G_Fees__c,Indoor_Injection_Fees__c,Lab_Fees__c,X_Ray_Fees__c,Total_Fee__c from Patient_Receipt__c WHERE Name like: temp];
   
   pr= [select Name__c,Registration_Number__c,Age__c,Diagnosis_Fees__c,E_C_G_Fees__c,Indoor_Injection_Fees__c,Lab_Fees__c,X_Ray_Fees__c,Total_Fee__c from Patient_Receipt__c WHERE Name =: temp];
  
   
    show= true;
    }
     System.Debug('pr');
    return null;  
    

    }
    
    
    public pageReference clr()
    {
    show=false;
    return null;
    
    }
    

}

my page:

<apex:page controller="viewrec" >

<apex:form >

<apex:pageBlock >
<apex:pageBlockSection >
<apex:inputField value="{!pr.Name__c}" label="Patient name"/>
</apex:pageBlockSection>

<apex:pageBlockButtons location="bottom">
<apex:commandButton value="view fee details" action="{!fees}"/>
<apex:commandButton value="Clear" action="{!clr}"/>
</apex:pageBlockButtons>

<apex:pageBlockTable rendered="{!show}" value="{!pr}" var="d">
<apex:column value="{!d.Name__c}" />
<apex:column value="{!d.Registration_Number__c}" />
<apex:column value="{!d.Age__c}" />
<apex:column value="{!d.Diagnosis_Fees__c}" />
<apex:column value="{!d.E_C_G_Fees__c}" />
<apex:column value="{!d.Indoor_Injection_Fees__c}" />
<apex:column value="{!d.Lab_Fees__c}" />
<apex:column value="{!d.X_Ray_Fees__c}" />
<apex:column value="{!d.Total_Fee__c }" />
</apex:pageblockTable>

</apex:pageBlock>

</apex:form>

</apex:page>