How to accept blank values while splitting DATE and TIME

Question

1.00/5 (1 vote)

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Hi,

I wrote a program to split the Date and Time as 2 different columns from 1 column.
If i have a blank value in datetime field, the split functionality is not working.
It's giving error stating "FormatException was unhandled" for below mentioned line:

DateTime Time = Convert.ToDateTime(column[i].ToString());

Please let me know where i have to correct.

Total code for that functionality is:

private void btnSplit_Click(object sender, EventArgs e)
{
DataGridViewTextBoxColumn dgvcdate = new DataGridViewTextBoxColumn();
dgvcdate.Name = cmbColumnCombo.Text;
dgvcdate.HeaderText = cmbColumnCombo.Text;
dataGridView1.Columns.Add(dgvcdate);

DataGridViewTextBoxColumn dgvctime = new DataGridViewTextBoxColumn();
dgvctime.Name = txtColumnName.Text.Replace(" ", "");
dgvctime.HeaderText = txtColumnName.Text;
dataGridView1.Columns.Add(dgvctime);

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 (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();
}
}
}
}
}
}
}

Posted 26-Jan-16 19:18pm

Member 8010354

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Comments

Suvendu Shekhar Giri 27-Jan-16 1:26am

Why don't you validate blank values?

Member 8010354 27-Jan-16 2:19am

Can you please explain clearly? Nevermind, i'm new to .net

2 solutions

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Manoj Sawant · Accepted Answer · 2016-01-26T19:31:00

Solution 1

First Check if the value you get is null

C#

if(column[i]!=null)
{
//convert to datetime
}

hope it helps you..

Posted 26-Jan-16 19:31pm

Manoj Sawant

BillWoodruff · Accepted Answer · 2016-01-26T20:53:00

Solution 2

Try this:

C#

DateTime dt;

DateTime Time =  DateTime.TryParse(ToDateTime(column[i].ToString(), out dt));

if(dt == null)
{
     // handle invalid date
     // throw error ?
     // use 'continue to proceed with column entry ?
}
else
{
     // valid date present in 'dt
}

Posted 26-Jan-16 20:53pm

BillWoodruff