I have written the code as below. here problem is that dt remain null. how to solve thst please tell me. public partial class Form1 : Form { private DataTable DTable; private DataRow drow; public Form1() { InitializeComponent(); } private OleDbConnection getConnection() { OleDbConnection con=new OleDbConnection (@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Documents and Settings\Administrator\My Documents\Visual Studio 2008\Projects\winApp for Student\winApp for Student\App_Data\SchooMgnSystem.mdb;Persist Security Info=True"); return con; } private void button1_Click(object sender, EventArgs e) { InsertData(); } private void InsertData() { if (DTable==null) { DTable = new DataTable(); DTable.Columns.Add("StudID", typeof(string)); DTable.Columns.Add("StudName", typeof (string)); DTable.Columns.Add("Address", typeof(string)); drow = DTable.NewRow(); drow[0] = txtStudID.Text; drow[1] = txtSTudName.Text; drow[2] = txtAddress.Text; DTable.Rows.Add(drow); grdStudent.DataSource = DTable; } else { drow = DTable.NewRow(); drow[0] = txtStudID.Text; drow[1] = txtSTudName.Text; drow[2] = txtAddress.Text; DTable.Rows.Add(drow); grdStudent.DataSource = DTable; } } private void button2_Click(object sender, EventArgs e) { string cmdstr; OleDbCommand cmd; OleDbConnection con = getConnection(); foreach (DataRow Drow in DTable.Rows) { cmdstr = "Insert into Student values('" + drow[0].ToString() + "','" + drow[1].ToString() + "','"+drow [2].ToString()+"')"; cmd = new OleDbCommand(cmdstr,con); try { con.Open(); cmd.ExecuteNonQuery(); } catch (Exception ex) { MessageBox.Show(ex.Message); } finally { con.Close(); } } }

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java.sql.SQLException:Invalid state, the statement object is closed Hai all i got this error when i am multiple times referesh web page

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I have got one job selection order from DECON ENGG(HRD), he told me to send 2000 rs of demand draff i have send the demand draff after some time a got a job selection order in banglore but he have written that u have to give 550 rs of Guidency fees in bangalore i dont understant what to do

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In .net how many error will occur?

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wut is pre law

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IMP-00096: Warning: Skipping table "string"."string" because type synonym "string"."string" cannot be created

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IMP-00000: Import terminated unsuccessfully Hi all . when i go to restore oracle dmp file in my database ans typing this command , C:UsersW>imp HR2011/HR2011@XE TABLES=* dmpfile=F:Share223.27.244.72EXP 2017-0113030008FU160710ZIP/FU160710.DMP this message was showed to me and restore mission filed . LRM-00101: unknown parameter name 'dmpfile' IMP-00022: failed to process parameters, type 'IMP HELP=Y' for help IMP-00000: Import terminated unsuccessfully how i can fix this problem plzzz

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What is SCD (Slowly Changing Dimensions)? What are its types?

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When ever i log onto tce and i join a sever such as Or killzone i can only play for a certain amount of time before i get kicked. it says that i have been disconected from server for unknown reason. i cant seem to figure it out. i tried turning off my fire wall, but didnt work. please if you can give me any info on what to do it would help alot. Thanks.

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write the value of x and y after execution of the statements: int x=19,y; y=x++ + ++x; x++; y++;

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What is probability to guarantee that the task a programmer is going to create will be created and be able to run on a particular system (RTOS/GPOS).

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2. A student studying Information Technology at Polytechnic of Namibia is examined by coursework and written examination. Both components of assessment carry a maximum of 50 marks. The following rules are used by examiners in order to pass or fail students. a. A student must score a total of 40% or more in order to pass (total = coursework marks + examination marks) b. A total mark of 39% is moderated to 40% c. Each component must be passed with a minimum mark of 20/50. If a student scores a total of 40% or more but does not achieve the minimum mark in either component he/she is given a technical fail of 39% (this mark is not moderated to 40%) d. Grades are awarded on marks that fall into the following categories. Mark 100-70 69-60 59-50 49-40 39-0 Grade A B C D E Write a program to input the marks for both components (coursework marks out of 50 and examination marks out of 50), out put the final mark and grade after any moderation. [30]

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hi can any one tell me.... do we need to use color catridge also in HP Deskjet 630C series printer.... i have kept only black catridge but its not working.......

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//jobname positional parms,keyword parms,.... Restart=step3 //.. //.. //.. //step3 exec=xxxx //... //step4 exec=yyyy,cond=(0,Le,step3) //.. //step5 exec=zzzz Restart =step 3 executes step3.Step 3 gives some return code.In step 4,the test is passed as 0 is less than step 3.So step 4 is bypassed and is not executed. and the program is responsible for issuing the return code that was not even loaded in the main storage. The result: no return code can exist In the steps that follow any test of COND parameter tat attempts to interrogate this non-existent return code will be ignored . Step 5 will be e executed. IN THIS EXAMPLE WHAT DOES XXXX YYYY ZZZZ MEAN?? PLEASE CAN ANYONE SAY...

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hi all, I am in the process of learning qtp. i havve windows vista in my system whenever i try to run flight reservation application , i am getting the following error "Operation must use an updateable query Fractional truncation (null) . And am unable to open Mercury tours web application due to some other error Can anyone help me please

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