Error while splitting the datetime fields

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Hi,

How to program to accept a blank values for datetime columns into the grid and below is the line of code i'm getting error:

dataGridView1.Rows[RowCount - 1].Cells[cmbIdentity.Text].Value - Now i'm getting Index value is out of range.

My total code is:

C#

for (int RowCount = 1; RowCount <= strfile.Length - 1; RowCount++)
            {
                if (strfile[RowCount].ToString() != "")
                {
                    if (RowCount != 0)
                    {
                        string[] column = strfile[RowCount].Split('þ');
                        for (int i = 1; i < column.Length - 1; i++)
                        {
                            if (cmbColumnCombo.SelectedIndex == ((i - 1) / 2))
                            {
                                if (!string.IsNullOrEmpty(column[i]) && column[i].ToString() != "\u0014")
                                    {
                                        
                                        dataGridView1.Rows.Add();
                                        
                                        DateTime Time = Convert.ToDateTime(column[i].ToString());
                                        dataGridView1.Rows[RowCount - 1].Cells[txtColumnName.Text.Replace(" ", "")].Value = Time.ToString("HH:mm:ss");
                                        dataGridView1.Rows[RowCount - 1].Cells[cmbColumnCombo.Text].Value = Time.ToString("dd/MM/yyyy");
                                        //dataGridView1.Rows[RowCount - 1].Cells[cmbColumn1.Text].Value += column[i].ToString();

                                }
                            }
                        }

                        for (int i = 1; i < column.Length - 1; i++)
                        {
                            if (cmbIdentity.SelectedIndex == ((i - 1) / 2))
                            {
                                if (!string.IsNullOrEmpty(column[i]) && column[i].ToString() != "\u0014")
                                {
                                    dataGridView1.Rows[RowCount - 1].Cells[cmbIdentity.Text].Value += column[i].ToString();
                                }
                            }
                        }
                    }
                }
            }

Can anyone please help me how to achieve this?

What I have tried:

Yeah i tried changing the code and it didn't worked.

Posted 14-Feb-16 21:09pm

Member 8010354

Updated 15-Feb-16 0:05am

v3

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Comments

Jochen Arndt 15-Feb-16 3:19am

Check if the string is empty and assign a defined value (NULL or a fixed date time value) if so. Then check for this defined value upon further processing (e.g. creating an empty string when converting back to string).

Member 8010354 15-Feb-16 4:24am

Can you help how to program to accept the blank values....

Jochen Arndt 15-Feb-16 4:36am

First you have to decide how to handle those empty fields. This is not related to any code or even the programming language. Once that is stated, you can implement the code.

Checking for an empty field can be done as already suggested by using DateTime.TryParse or String.IsNullOrEmpty.

Member 8010354 15-Feb-16 6:20am

Can you please help me now as i have used the IsNull
Empty but the error is different

Jochen Arndt 15-Feb-16 6:34am

What kind of error?
In which line?

Note also that ToDateTime fails when the string can't be converted (invalid format).

Not related to your problem but unneccessary:
column[i].ToString()

column[] is an array of strings. So accessing an element already return a string.

Member 8010354 15-Feb-16 6:54am

I'm getting error in this line:
dataGridView1.Rows[RowCount - 1].Cells[cmbIdentity.Text].Value += column[i].ToString();

Index was out of range. Must be non-negative less than the size of collection.

Jochen Arndt 15-Feb-16 7:16am

This not really related to your original question. You may raise a new one for this.

To find the error you may use the debugger and step through your code to watch the indexes and contents of your arrays. At a first look the code seems to be OK but only you might know the value of cmbIdentity.Text and the accessed cell when running it.

Sinisa Hajnal 15-Feb-16 3:35am

"I tried changing the code..." with no example of description how sounds like you didn't try anything at all.

Member 8010354 15-Feb-16 5:25am

I tried using IsNullorEmpty property
if (RowCount != 0)
{
string[] column = strfile[RowCount].Split('þ');
for (int i = 1; i < column.Length - 1; i++)
{
if (cmbColumnCombo.SelectedIndex == ((i - 1) / 2))
{
if (!string.IsNullOrEmpty(column[i].ToString()) && column[i].ToString() != "\u0014")
{

dataGridView1.Rows.Add();

DateTime Time = Convert.ToDateTime(column[i].ToString());
dataGridView1.Rows[RowCount - 1].Cells[txtColumnName.Text.Replace(" ", "")].Value = Time.ToString("HH:mm:ss");
dataGridView1.Rows[RowCount - 1].Cells[cmbColumnCombo.Text].Value = Time.ToString("dd/MM/yyyy");
//dataGridView1.Rows[RowCount - 1].Cells[cmbColumn1.Text].Value += column[i].ToString();

}
}
}

for (int i = 1; i < column.Length - 1; i++)
{
if (cmbIdentity.SelectedIndex == ((i - 1) / 2))
{
if (!string.IsNullOrEmpty(column[i].ToString()) && column[i].ToString() != "\u0014")
{
dataGridView1.Rows[RowCount - 1].Cells[cmbIdentity.Text].Value += column[i].ToString();
}
}
}

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Sinisa Hajnal · Answer 1 · 2016-02-14T21:38:00

First, check that the column isn't empty before you try to convert. Second, there is TryParse method that will not throw an exception when the object cannot be converted. Finally, You don't have to split date time object, you just need to show it in different format.
For example:
If you have date 2016-02-15 09:35:55 in your

C#

DateTime t = DateSerial(2016, 2, 15, 9,35,55);

You can show date only with

C#

t.ToString(dd.MM.yyyy");

Time only (without seconds) with:

C#

t.ToString("HH:mm");

And there are plenty of shorthand methods to choose from

C#

t.ToShortDateString();

for example will format your date by the current culture on the client computer and will show only date component.