Error message while uploading the documents of Share Point Grid View

Hello,

I made a Share Point Grid View and uploaded the documents. When I try to save the file, an error message appears that I should check the document out (The source code, and file address that I have made is attached). Upon saving the document, an error message appeared.

Can somebody here understand JavaScript programming? 

The file "http://172.16.10.238:101/sites/SEWS/Documents/SharePointProjectItem.spdata" is not checked out.  You must first check out this document before making changes. Troubleshoot issues with Microsoft SharePoint Foundation. Correlation ID: eb1a73ba-2864-4ffa-8cb8-bc2b80022bb3 Go back to site.

The code is as follows:

using (SPSite mySite = new SPSite(SPContext.Current.Web.Url))
                    {
                        using (SPWeb myWeb = mySite.OpenWeb())
                        {
                            SPList list = myWeb.Lists["Documents"];
                            string strListId = list.ID.ToString();
                            string strWebUrl = SPContext.Current.Web.Url.ToString();

                            //View Properties template
                            MenuItemTemplate mitViewProp = (MenuItemTemplate)mtName.FindControl("mitViewProp");
                            string strViewUrl = strWebUrl + "/Documents/Forms/DispForm.aspx?ID=%ID%";
                            mitViewProp.ClientOnClickNavigateUrl = "javascript:OpenPopUpPage('" + strViewUrl + "')";

                            //Edit Properties template
                            MenuItemTemplate mitEditProp = (MenuItemTemplate)mtName.FindControl("mitEditProp");
                            string strEditUrl = strWebUrl + "/Documents/Forms/EditForm.aspx?ID=%ID%";
                            mitEditProp.ClientOnClickNavigateUrl = "javascript:OpenPopUpPage('" + strEditUrl + "',RefreshPage)";

                            //Check In template
                            MenuItemTemplate mitCheckIn = (MenuItemTemplate)mtName.FindControl("mitCheckIn");
                            string strCheckInUrl = strWebUrl + "/_layouts/checkin.aspx?List=" + strListId + "&FileName=" + strWebUrl + "/Documents/%FileName%";
                            mitCheckIn.ClientOnClickNavigateUrl = "javascript:OpenPopUpPage('" + strCheckInUrl + "')";

                            //Check Out template
                            MenuItemTemplate mitCheckOut = (MenuItemTemplate)mtName.FindControl("mitCheckOut");
                            mitCheckOut.ClientOnClickScript = "javascript:alert('test function calling from server site event.')";

Please give suggestions on how to make my SharePoint project work.

Thanks.