How do I export data from a datagridview/data set into an Access Database? [C#] -

so title pretty self explanatory, far have read microsofts documentation , watched youtube videos regarding issue here.

firstly project code here:

using system; using system.collections.generic; using system.componentmodel; using system.data; using system.drawing; using system.linq; using system.text; using system.threading.tasks; using system.windows.forms; using system.data.oledb;  namespace application {     public partial class form1 : form     {         public form1()         {             initializecomponent();         }          private void label1_click(object sender, eventargs e)         {          }          private void label2_click(object sender, eventargs e)         {          }          private void button1_click(object sender, eventargs e)         {             foreach (datarow r in dsequipment.tables[0].rows)             {                 datarow dr = sqtdbdataset.tblequipment.newrow();                 dr[0] = r[0];                 dr[1] = r[1];                 dr[2] = r[2];                 dr[3] = r[3];                 dr[4] = r[4];                 dr[5] = r[5];                 dr[6] = r[6];                 dr[7] = r[7];                 dr[8] = r[8];                 dr[9] = r[9];                 dr[10] = r[10];                 dr[11] = r[11];                 dr[12] = r[12];                 dr[13] = r[13];                 dr[14] = r[14];                 dr[15] = r[15];                 dr[16] = r[16];                  sqtdbdataset.tblequipment.rows.add(dr);             }             //tblequipmenttableadapter.update(sqtdbdataset.tblequipment);             //tableadaptermanager.updateall(sqtdbdataset);         }          private void btnupdate_click(object sender, eventargs e)         {             try             {                 this.validate();                 this.tblequipmentbindingsource.endedit();                 this.tblequipmenttableadapter.update(this.sqtdbdataset.tblequipment);                 messagebox.show("update successful");             }             catch (system.exception ex)             {                 messagebox.show("update failed");             }         }          private void btnreadexcel_click(object sender, eventargs e)         {             openfiledialog ofd = new openfiledialog();              if (ofd.showdialog() == system.windows.forms.dialogresult.ok)             {                 string strfilename = ofd.filename;                 txtfilename.text = strfilename;             }         }          private void datagridview2_cellcontentclick(object sender, datagridviewcelleventargs e)         {          }          private void tblequipmentbindingnavigatorsaveitem_click(object sender, eventargs e)         {             this.validate();             this.tblequipmentbindingsource.endedit();             this.tableadaptermanager.updateall(this.sqtdbdataset);          }          private void form1_load(object sender, eventargs e)         {             // todo: line of code loads data 'sqtdbdataset.tblequipment' table. can move, or remove it, needed.             this.tblequipmenttableadapter.fill(this.sqtdbdataset.tblequipment);          }          private void btnopenfile_click(object sender, eventargs e)         {             try             {                 // establish connection between c# application , excel file.                 oledbconnection con = new oledbconnection(@"provider=microsoft.ace.oledb.12.0;data source=" + txtfilename.text + ";extended properties=excel 12.0");                 // reading data excel file.                 oledbdataadapter da = new oledbdataadapter("select * [equipments$]", con);                 // data file loaded dataset.                 da.fill(dsequipment);                 // show in message box how many rows of data there is.                  //messagebox.show(dsequipment.tables[0].rows.count.tostring());                 // show data in data grid view.                 dgequipment.datasource = dsequipment.tables[0];             }             catch             {                 messagebox.show("please select sqt2 excel sheet.");             }         }     } } 

so first attempt @ tackling problem this:

            //tblequipmenttableadapter.update(sqtdbdataset.tblequipment);             //tableadaptermanager.updateall(sqtdbdataset); 

i no errors reason access database not showing updates.

my second attempt following:

private void btnopenfile_click(object sender, eventargs e) {     try     {         // establish connection between c# application , excel file.         oledbconnection con = new oledbconnection(@"provider=microsoft.ace.oledb.12.0;data source=" + txtfilename.text + ";extended properties=excel 12.0");         // reading data excel file.         oledbdataadapter da = new oledbdataadapter("select * [equipments$]", con);         // data file loaded dataset.         da.fill(dsequipment);         // show in message box how many rows of data there is.          //messagebox.show(dsequipment.tables[0].rows.count.tostring());         // show data in data grid view.         dgequipment.datasource = dsequipment.tables[0];     }     catch     {         messagebox.show("please select sqt2 excel sheet.");     } } 

which seperate button , obtained code microsofts documentation , changed variables of dataset , database table, no errors... yet still access database not updating!

completely stuck right , appreciated! :)

thank you!