Cannot find column 0 in C#?

Question

3.00/5 (2 votes)

See more:

dtTable.Column[0].ColumnName=STUDENTS_INFORMATION.ID.ToString(); //This error is:
Cannot find column 0.

Excel file:

ID   NAME    CLASS

  86    Kelvin    4  

  59    Johny     7

DATABASE TABLE: STUDENTS_INFORMATION

ID NAME CLASS

I'm trying to read Excel values.
I read the values in foreach condition, but I can't write datatable.And so here I get the error.
Cannot find column 0.

What I have tried:

C#

//select column and set

DataTable dtTable = new DataTable();

dtTable.Column[0].ColumnName=STUDENTS_INFORMATION.ID.ToString();
dtTable.Column[1].ColumnName=STUDENTS_INFORMATION.Name.ToString();
dtTable.Column[2].ColumnName=STUDENTS_INFORMATION.Class.ToString();
}

Posted 2-Jun-19 8:22am

StudentSC

Updated 2-Jun-19 21:34pm

Patrice T

v4

Add a Solution

Comments

Nirav Prabtani 3-Jun-19 1:27am

Put, breakpoint and try to find the values in the dataSet

Why your dataset doesn't contains the values ?

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2019-06-02T20:04:00

If you don't have a column 0, then you don't have a column - you have a completely empty DataTable, the the most likely reason for that is that your sheet is also empty.

We can't check that - we have no access to your spreadsheet - so we can't check that for you.

So, it's going to be up to you.
Fortunately, you have a tool available to you which will help you find out what is going on: the debugger. If you don't know how to use it then a quick Google for "Visual studio debugger" should give you the info you need.

Put a breakpoint on the first line in the function, and run your code through the debugger. Then look at your code, and at your data and work out what should happen manually. Then single step each line checking that what you expected to happen is exactly what did. When it isn't, that's when you have a problem, and you can back-track (or run it again and look more closely) to find out why.

Sorry, but we can't do that for you - time for you to learn a new (and very, very useful) skill: debugging!

Dylvh · Answer 2 · 2019-06-02T21:19:00

I think it might be because your table doesn't have any rows.

Here you're creating a new instance of the DataTable and immediately trying to access the columns

C#

DataTable dtTable = new DataTable();

dtTable.Column[0].ColumnName=STUDENTS_INFORMATION.ID.ToString();

You need to add a row to that DataTable first.

C#

DataTable dtTable = new DataTable();
dtTable.NewRow(); // Add a new row
dtTable.Column[0].ColumnName=STUDENTS_INFORMATION.ID.ToString();

Cannot find column 0 in C#?

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0