CODEWITHSUNDEEP
c#winformsdatagridviewado.net
AndrewMC
AndrewMC

Reputation: 271

why the datasource shows as null of the Datagridview, when it's already has been assigned with data?

I have the following code to fill datagridview from a returning datatable.

DataTable dtCourse = Course.GetAllCourses();

for (int i = 0; i < dt.Rows.Count; i++)
{
    dgvAvailableCourses.Rows.Add();
    dgvAvailableCourses[0, i].Value = dtCourse.Rows[i][0];

    //set image
    dgvAvailableCourses[1, i].Value = SMSV100.Properties.Resources.media_playback_stop_6;

    dgvAvailableCourses[2, i].Value = dtCourse.Rows[i][1];
    dgvAvailableCourses[3, i].Value = dtCourse.Rows[i][2];
    dgvAvailableCourses[4, i].Value = dtCourse.Rows[i][3];
    dgvAvailableCourses[5, i].Value = dtCourse.Rows[i][4];
    dgvAvailableCourses[6, i].Value = dtCourse.Rows[i][5];
    dgvAvailableCourses[7, i].Value = dtCourse.Rows[i][6];

    Console.WriteLine(dgvAvailableCourses.DataSource);
}

dgvAvailableCourses is the DataGridview dtCourses is the returned datatable from the GetAllCourses()

As you can see I have mapped the columns of the datagridview to the columns of the datatable and added rows. Funny things is when I tried to read the datasource using the console.writeline() I've used a break point, it showed null for the datasource.

How come this is possible why this datasource showed as null while it already assigned with data through the loops?

How do I overcome this, I need to access the underlying table of this datagridview in order to do some calculations but I cannot do that because it shows as null?

PS- Datagridview shows data without any problems but it shows null for the datasource thanks

Upvotes: 0

Views: 1139

Answers (1)

H&#233;ctor Asencio L
H&#233;ctor Asencio L

Reputation: 141

I'm guessing that you didn't bind the DataGridView to your source, you're just adding rows manually. If you do dgvAvailableCourses.DataSource = dtCourse, I think that you will have the binding done "correcty" (I'm assuming that you had a good reason to use a loop instead of just settng the DataSource property).

Upvotes: 3

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