Get value of cell in last row of data in datagridview

Question

5.00/5 (1 vote)

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How can i get the value of the cell in last row of data upon function calling and not user click?
the newID would always be null and no value is passed into it and exception would occur every time i run it

C#

private void GetLastRow()
{
    if (dtgFTP.Rows.Count > 0)
    {
        int nRowIndex = dtgFTP.Rows.Count - 1; //last row index
        object newID = dtgFTP.Rows[nRowIndex].Cells[1].Value;
        int ID = Convert.ToInt32(newID) + 1;
        //int newID = nRowIndex + 1;
        txtftpID.Text = ID.ToString();
        txtftpID.ReadOnly = true;
    }
    else
    {
        txtftpID.Text = "1";
        txtftpID.ReadOnly = true;
    }

}

Posted 6-Apr-14 23:10pm

Jamie888

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Comments

Naz_Firdouse 7-Apr-14 5:22am

what is the exception you are getting?

Jamie888 7-Apr-14 5:25am

now the exception is gone, maybe some bugs which caused the exception. But the newID value is still null. What is the problem?

Naz_Firdouse 7-Apr-14 5:26am

make sure the data you binded is not null...

Jamie888 7-Apr-14 5:30am

ya, it is not null, from the nRowIndex, i get 1 as i only has only 1 row of record in my datagrid. Then i pass it into the second line of codes. By right it should giv me the value of the cell which is "2", but it will only return null.

2 solutions

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PJ003 · Accepted Answer · 2014-04-06T23:36:00

Solution 1

C#

private void GetLastRow()
{
    if (dtgFTP.Rows.Count > 0)
    {
        int nRowIndex = dtgFTP.Rows.Count - 1; //last row index
        //replace dtgFTP.Rows[nRowIndex].Cells[1].Value to dtgFTP.Rows[nRowIndex].Cells[1].Text
        object newID = dtgFTP.Rows[nRowIndex].Cells[1].Text;
        int ID = Convert.ToInt32(newID) + 1;
        //int newID = nRowIndex + 1;
        txtftpID.Text = ID.ToString();
        txtftpID.ReadOnly = true;
    }
    else
    {
        txtftpID.Text = "1";
        txtftpID.ReadOnly = true;
    }
}

Posted 6-Apr-14 23:36pm

PJ003

Updated 6-Apr-14 23:38pm

v3

Comments

Jamie888 7-Apr-14 5:39am

there is no .Text extension for the dtgFTP.Rows[nRowIndex].Cells[1]

lukeer 7-Apr-14 5:52am

DataGridViewCell[^] has not Text property. But Value[^] does exist. Please explain your suggestion.

PJ003 7-Apr-14 5:59am

If you are using DataGridView, how can you use Rows.Count ???

Jamie888 8-Apr-14 5:22am

its already been stated on the title. Anyway thanks for your effort. The problem has been solved.

Jamie888 · Accepted Answer · 2014-04-07T17:10:00

private void GetLastRow()
       {
           XmlReader reader = XmlReader.Create(XPathFolder + xmlFileFTP, new XmlReaderSettings());
           DataSet ds = new DataSet();

           ds.ReadXml(reader);
           dtgFTP.DataSource = ds.Tables["FTP"];

           if (dtgFTP.DataSource == null)
           {
               if (dtgFTP.Rows.Count > 0)
               {
                   int nRowIndex = dtgFTP.Rows.Count - 1; //last row index
                   object newID = dtgFTP.Rows[nRowIndex].Cells[0].Value;
                   int ID = Convert.ToInt32(newID) + 1;
                   //int newID = nRowIndex + 1;
                   txtftpID.Text = ID.ToString();
                   txtftpID.ReadOnly = true;
               }
           }
           else if (dtgFTP.DataSource != null)
           {
               if (dtgFTP.Rows.Count > 0)
               {
                   int nRowIndex = dtgFTP.Rows.Count - 2; //last row index
                   object newID = dtgFTP.Rows[nRowIndex].Cells[0].Value;
                   int ID = Convert.ToInt32(newID) + 1;
                   //int newID = nRowIndex + 1;
                   txtftpID.Text = ID.ToString();
                   txtftpID.ReadOnly = true;
               }
           }
           else
           {
               txtftpID.Text = "1";
               txtftpID.ReadOnly = true;
           }

           reader.Close();
       }