I got Error Mssage How to resolve thismessage

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SQL-server-2000

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C#

Question qs = new Question();
                        string name = Request.QueryString["UserName"];
                        TextBox txtQuestionNo = (TextBox)row.FindControl("Question No");
                        
                        
                        TextBox txtComments = (TextBox)row.FindControl("Comments");
                        //TextBox txtMarks = (TextBox)row.FindControl("Marks");

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 156:
Line 157:                        //SqlDataAdapter daq = new SqlDataAdapter("update Questionnaire_UserAnswers set Comments='" + txtComments.Text + "', Marks=" + txtMarks.Text + " where Question_ID=" + txtQuestionNo.Text + "UserName='" + name + "'", con);
Line 158:                        SqlDataAdapter daq = new SqlDataAdapter("update Questionnaire_UserAnswers set Comments='" + txtComments.Text + " where Question_ID=" + txtQuestionNo.Text + "UserName='" + name + "'", con);
Line 159:
Line 160:


advance thank for valuable replay

Posted 28-Nov-11 22:13pm

2011999

Updated 28-Nov-11 22:15pm

uspatel

v2

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2011999 29-Nov-11 4:14am

not taken values form gridview textbox

uspatel 29-Nov-11 4:15am

pre tag added.

3 solutions

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OriginalGriff · Answer 1 · 2011-11-28T22:15:00

Solution 1

Take out the space:

C#

TextBox txtQuestionNo = (TextBox)row.FindControl("Question No");

Becomes

C#

TextBox txtQuestionNo = (TextBox)row.FindControl("QuestionNo");

Posted 28-Nov-11 22:15pm

OriginalGriff

Comments

thatraja 29-Nov-11 4:25am

Spot on, 5!

Eduard Lu · Answer 2 · 2011-11-28T22:25:00

Solution 2

Try adding Cells[index]

C#

TextBox txtQuestionNo = (TextBox)row.Cells[0].FindControl("Question No");

or

C#

TextBox txtQuestionNo = (TextBox)row.Cells[0].FindControl("QuestionNo");

depending on the ID of your textbox control

Please mark as answer and vote 5 if this solved your problem

Regards,
Eduard

Posted 28-Nov-11 22:25pm

Eduard Lu

Updated 28-Nov-11 22:28pm

v3

Comments

2011999 29-Nov-11 4:43am

not solved my problem still same Error dispaly

[no name] 29-Nov-11 4:54am

is "row" a gridview or a gridviewrow?

[no name] 29-Nov-11 4:56am

i'll be posting another solution, i think i got it.

2011999 29-Nov-11 22:56pm

is Gridviewrows

Eduard Lu · Answer 3 · 2011-11-28T23:00:00

FROM:
Line 158: SqlDataAdapter daq = new SqlDataAdapter("update Questionnaire_UserAnswers set Comments='" + txtComments.Text + " where Question_ID=" + txtQuestionNo.Text + "UserName='" + name + "'", con);
Line 159:
Line 160:

TO:
Line 158: SqlDataAdapter daq = new SqlDataAdapter("update Questionnaire_UserAnswers set Comments='" + txtComments.Text + "' where Question_ID='" + txtQuestionNo.Text + "' AND UserName='" + name + "'", con);
Line 159:
Line 160:

See code changes above after doing Solution #2

Please mark as answer and vote 5 if this solved your problem

Regards,
Eduard

I got Error Mssage How to resolve thismessage

3 solutions

Solution 1

Solution 2

Solution 3

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