Hi Friends,
I  am facing issues with the insert operation while reading from csv
can you help me on that


public class ImportDataFromCSVController {
    
    public Blob csvFileBody{get;set;}
    public List<SalesInfluenceReporting__c> salesInfList{get;set;}
    public Boolean showSave{get;set;}
    public Integer salesInfCount{get;set;}
    
    public ImportDataFromCSVController(){
        showSave = false;
        salesInfCount = 0;
    }
    
    public void saveRecords() {
        ApexPages.getMessages().clear();
        
        try{
                    
                    upsert salesInfList;
                    ApexPages.Message errorMessage = new ApexPages.Message(ApexPages.severity.CONFIRM,'Sales Influence Report Updated Successfully');
                    ApexPages.addMessage(errorMessage);
                
            
        }catch (Exception e){
            addErrorMsg('An error has occured while saving the Sales Influence Report.');
        }
     
    }
    
    public void importCSVFile(){
        showSave = false;
        salesInfList = New List<SalesInfluenceReporting__c>();
        map<String,SalesInfWrapper> csvMap = new map<String,SalesInfWrapper>();
        Integer mmsIdColumnNo = null;
        Integer quarterColumnNo = null;
        Integer monthColumnNo = null;
        Integer clientColumnNo = null;
        Integer OGColumnNo = null;
        Integer subVertColumnNo = null;
        Integer oppNameColumnNo = null;
        Integer statusColumnNo = null;
        Integer devOffColumnNo = null;
        Integer valueColumnNo = null;
        Integer natureOfOpptyColumnNo = null;
        Integer demoDoneColumnNo = null;
        string csvAsString = '';
        list<String> csvFileLines = new list<String>();
        
        
        List<SalesInfluenceReporting__c> tempList = new List<SalesInfluenceReporting__c>();
        try{
            csvAsString = csvFileBody.toString();
            csvFileLines = csvAsString.split('\n');
        }catch (Exception e){
            addErrorMsg('An error has occured while importing data. Please make sure input csv file is correct');
            return;
        }
        
        list<String> csvHeaderData = csvFileLines[0].split(',');
        for(Integer i=0;i<csvHeaderData.size();i++){
            if(csvHeaderData[i].trim()=='MMS Id'){
                mmsIdColumnNo = i;
            }else if(csvHeaderData[i].trim()=='Quarter'){
                quarterColumnNo = i;
            }else if(csvHeaderData[i].trim()=='Month'){
                monthColumnNo = i;
            }else if(csvHeaderData[i].trim()=='Client'){
                clientColumnNo = i;
            }else if(csvHeaderData[i].trim()=='OG'){
                OGColumnNo = i;
            }else if(csvHeaderData[i].trim()=='Sub-Vertical'){
                subVertColumnNo = i;
            }else if(csvHeaderData[i].trim()=='Opportunity Name'){
                oppNameColumnNo = i;
            }else if(csvHeaderData[i].trim()=='Status'){
                statusColumnNo = i;
            }else if(csvHeaderData[i].trim()=='DevOps Offered'){
                devOffColumnNo = i;
            }else if(csvHeaderData[i].trim()=='Value'){
                valueColumnNo = i;
            }else if(csvHeaderData[i].trim()=='Nature Of Oppty'){
                natureOfOpptyColumnNo = i;
            }else if(csvHeaderData[i].trim()=='Demo Done'){
                demoDoneColumnNo = i;
            }
        }
        if(mmsIdColumnNo != null && quarterColumnNo != null && monthColumnNo != null && clientColumnNo != null && OGColumnNo != null && subVertColumnNo != null && oppNameColumnNo != null && statusColumnNo !=null && devOffColumnNo != null && valueColumnNo !=null && natureOfOpptyColumnNo != null && demoDoneColumnNo !=null ){
            
            for(Integer i=1;i<csvFileLines.size();i++){
                string[] csvRecordData = csvFileLines[i].split(',');
                SalesInfWrapper recWrapper = new SalesInfWrapper();
               
                recWrapper.mmsId = csvRecordData[mmsIdColumnNo];
                recWrapper.quarter = csvRecordData[quarterColumnNo];    
                recWrapper.month = csvRecordData[monthColumnNo];
                recWrapper.client = csvRecordData[clientColumnNo];
                recWrapper.OG = csvRecordData[OGColumnNo];
                recWrapper.subVertical = csvRecordData[subVertColumnNo];
                recWrapper.oppName = csvRecordData[oppNameColumnNo];
                recWrapper.status = csvRecordData[statusColumnNo];
                recWrapper.devOpsOff = csvRecordData[devOffColumnNo];
                recWrapper.value = csvRecordData[valueColumnNo];
                recWrapper.natureOfOpty = csvRecordData[natureOfOpptyColumnNo];
                recWrapper.demoDone = csvRecordData[demoDoneColumnNo];
                  
                csvMap.put(csvRecordData[mmsIdColumnNo],recWrapper); 
                
                //salesInfList.add(recWrapper);
                }
                
            }
            tempList = [Select MMS_Id__c, Quarter__c, Month__c, Client__c, OG__c, Opportunity_Name__c, Sub_Vertical__c,Demo_Done__c, Status__c,Value__c,Nature_of_Oppty__c, DevOps_Offered__c From SalesInfluenceReporting__c Where MMS_Id__c In : csvMap.keySet()];
            system.debug('------tempList -----'+tempList );
            system.debug('------tempList.size()-----'+tempList.size() );
            if(tempList.size()>0)
            {
                for(SalesInfluenceReporting__c currRec : tempList ){
                            currRec.MMS_Id__c = csvMap.get(currRec.MMS_Id__c).mmsId;
                            currRec.Quarter__c = csvMap.get(currRec.MMS_Id__c).quarter;
                            currRec.Month__c = csvMap.get(currRec.MMS_Id__c).month;
                            currRec.Client__c = csvMap.get(currRec.MMS_Id__c).client;
                            currRec.OG__c = csvMap.get(currRec.MMS_Id__c).OG;
                            currRec.Sub_Vertical__c = csvMap.get(currRec.MMS_Id__c).subVertical;
                            currRec.Opportunity_Name__c = csvMap.get(currRec.MMS_Id__c).oppName;
                            currRec.Status__c = csvMap.get(currRec.MMS_Id__c).status;
                            currRec.DevOps_Offered__c = csvMap.get(currRec.MMS_Id__c).devOpsOff;
                            currRec.Value__c = csvMap.get(currRec.MMS_Id__c).value;
                            currRec.Nature_of_Oppty__c = csvMap.get(currRec.MMS_Id__c).natureOfOpty;
                            currRec.Demo_Done__c = csvMap.get(currRec.MMS_Id__c).demoDone;
                            salesInfList.add(currRec);
                    }
            }
            
            else{
                addErrorMsg('No Matching Sales Influence Reports Found.');
                return;
                }
            if(salesInfList.size()>0){
                showSave = true;
                salesInfCount = salesInfList.size();
                system.debug('------countt-----'+salesInfCount );
            }
            /*else if(salesInfList.size() == 0){
                showSave = true;
                saveRecords();
            } */
            else
            {
                addErrorMsg('No Sales Influence Reports To Update. All values are up to date.');
            }
           }
            
      
    public class SalesInfWrapper{
        public string mmsId{get;set;}
        public string quarter{get;set;}
        public string month{get;set;}
        public string client{get;set;}
        public string OG{get;set;}
        public string subVertical{get;set;}
        public string oppName{get;set;}
        public string status{get;set;}
        public string devOpsOff{get;set;}
        public string value{get;set;}
        public string natureOfOpty{get;set;}
        public string demoDone{get;set;}
        
    }
    
    public void addErrorMsg(String err){
        ApexPages.Message errorMessage = new ApexPages.Message(ApexPages.severity.ERROR,err);
        ApexPages.addMessage(errorMessage);
    }

   
}
************************vf page****************


<apex:page controller="ImportDataFromCSVController">
    <apex:form >
        <apex:pagemessages />
        <apex:pageBlock >
            <apex:pageBlockSection columns="4"> 
                <apex:inputFile value="{!csvFileBody}"  />
                <apex:commandButton value="Upload CSV" action="{!importCSVFile}"/>
            </apex:pageBlockSection>
        </apex:pageBlock>
        <apex:pageBlock id="opptySec">
            <apex:pageBlockButtons location="top">
               <apex:commandButton action="{!saveRecords}" value="Save Sales Influence Reports" /> 
            </apex:pageBlockButtons>
             <apex:outputPanel rendered="{!showSave}"><b>Number Of Opportunities : {!salesInfCount }</b></apex:outputPanel>
           <apex:pageblocktable value="{!salesInfList}" var="salesInf">
                <apex:column value="{!salesInf.MMS_Id__c}"/> 
                <apex:column value="{!salesInf.Quarter__c}"/>
                <apex:column value="{!salesInf.Month__c}"/>
                <apex:column value="{!salesInf.Client__c}"/>
                <apex:column value="{!salesInf.OG__c}"/>
                <apex:column value="{!salesInf.Sub_Vertical__c}"/>
                <apex:column value="{!salesInf.Opportunity_Name__c }"/>
                <apex:column value="{!salesInf.Status__c }"/>
                <apex:column value="{!salesInf.DevOps_Offered__c }"/>
                <apex:column value="{!salesInf.Value__c }"/>
                <apex:column value="{!salesInf.Nature_of_Oppty__c }"/>
                <apex:column value="{!salesInf.Demo_Done__c }"/>
                
                
            </apex:pageblocktable> 
        </apex:pageBlock>
    </apex:form>
</apex:page>
             
Thanks
Vijaykumar