how to edit the attachment file in ASP.net MVC4 -

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i have created list of project in crud operation, in have created list of projects uploading attachment. problem when update project list. unable read inserted file , unable upload attachment file.

businees access layer code is

public bool updateproject(projectinfomodel upd)     {         try         {             int projectid = upd.projectid;             string projectcode = upd.projectcode;             string projectname = upd.projectname;             int projecttechnologiesid = upd.projecttechnologiesid;             int projectengagementmodelid = upd.projectengagementmodelid;             int clientid = upd.clientid;             datetime projectstartdate = upd.projectstartdate;             datetime projectenddate = upd.projectenddate;             string remarks = upd.remarks;             datetime createddatetime = upd.createddatetime;             int createdby = upd.createdby;             int lastmodifiedby = upd.lastmodifiedby;             datetime lastmodifieddatetime = upd.lastmodifieddatetime;             string projectstatus = upd.projectstatus;              int projectleadid = upd.projectleadid;             int accountmanagerid = upd.accountmanagerid;              // below code stored procedure              db.projectupdate(projectid, projectcode, projectname, projecttechnologiesid, projectengagementmodelid, clientid, projectstartdate, projectenddate, remarks, createddatetime, createdby, lastmodifiedby, lastmodifieddatetime, projectstatus, projectleadid, accountmanagerid);              }         catch (exception e)         {           }         return true;     }

controller code is

public actionresult updateproject(string id)     {        projectinfomodel pm = new projectinfomodel();          try         {             pm = objpmsbal.getproject(convert.toint32(id));             viewbag.clientid = new selectlist(objpmsbal.listclientid(), "clientid", "clientid");             viewbag.projectengagementmodelid = new selectlist(objpmsbal.listengagementid(), "projectengagementmodelid", "projectengagementmodelid");             viewbag.resourceid = new selectlist(objpmsbal.listresourceid(), "resourceid", "resourceid");             viewbag.technologyid = new selectlist(objpmsbal.listtechnologyid(), "projecttechid", "projecttechid");          }          catch (exception e)         {           }         return view(pm);       }       [httppost]     public actionresult updateproject(projectinfomodel up)     {         if (modelstate.isvalid)         {              objpmsbal.updateproject(up);       // calling bal method           }          return redirecttoaction("projectlist1");     }

so need solve problem. thank in advance.


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