How to display the records based on Picklist value in visualforce

<apex:page controller="AccountController2" showHeader="false">
 <apex:slds />
<apex:form id="test">
<apex:selectList size="1"    style="width:10%;" value="{!selectedIndustry}" styleClass="slds-input" rendered="{!isclicked==false}">   
            <apex:selectOptions value="{!AccountIndPickValues}"  /> 
        </apex:selectList> <br/><br/>
<apex:commandButton value="show"   rendered="{!isclicked==false}" styleClass="slds-button slds-button_brand" action="{!searchAccountRecords}"  />
        <apex:outputpanel rendered="{!isclicked==true}" >
<table class="slds-table"  width="100%" style="margin-left:5px;">
<tr>
  <td><b>S.No</b></td>
  <td><b>Name</b></td>
  <td><b>Site</b></td>
  <td><b>AccountNumber </b></td>
  <td><b>Industry</b></td>
  <apex:variable value="{!0}" var="index" />
  </tr>
<apex:repeat value="{!acc_list}" var="Items">
<tr>
  <td>
<apex:variable value="{!index + 1}" var="index" />
{!index} 
  </td>
  <td>
  <apex:outputText value="{!Items.Name}"/>
  </td>
  <td>
  <apex:outputText value="{!Items.Site}"/>
  </td>
  <td>
  <apex:outputText value="{!Items.AccountNumber }"/>
  </td>
  <td>
  <apex:outputText value="{!Items.Industry}"/>
  </td>
</tr>
</apex:repeat> 
</table>   
</apex:outputpanel>
</apex:form>
</apex:page>



public class AccountController2
{
    public string selectedIndustry{set;get;}
    public List<Account> acc_list{set;get;}
    public boolean isclicked{set;get;}
    public AccountController2()
    {
        getAccountIndPickValues();
        isclicked=false;
    }
    public List<SelectOption> getAccountIndPickValues()
    {
        List<SelectOption> options = new List<SelectOption>();
        Schema.DescribeFieldResult fieldResult = Account.Industry.getDescribe();
        List<Schema.PicklistEntry> ple = fieldResult.getPicklistValues();
        options.add(new SelectOption('','--None--'));
        for(Schema.PicklistEntry f : ple)
        {
            options.add(new SelectOption(f.getLabel(), f.getValue()));
        }
        return options;         
    }
    public void searchAccountRecords()
    {
        isclicked=true;
        acc_list=[select Name,Site,AccountNumber,Industry from Account where Industry=:selectedIndustry];

    }
}