How Can I Get Cell Value On Cell leave Event Of Datagridview?

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I am using following code:

C#

dgvEdu.UpdateCellValue(e.ColumnIndex, e.RowIndex);

                string headerText = dgvEdu.Columns[e.ColumnIndex].HeaderText;
                DataGridViewDataErrorEventArgs ex;

                DataGridViewRow objRow = new DataGridViewRow();
                objRow = dgvEdu.Rows[e.RowIndex];

                if (headerText.Equals("Total Marks"))
                {
                    string strPattern = "^([0-9]{1,7}|[0-9]{1,7}.[0-9]{1,3})$";
                    Regex objrgx = new Regex(strPattern);

                    string cellValue = Convert.ToString(objRow.Cells["Total Marks"].Value);

                    if (objrgx.IsMatch(cellValue) == false)
                    {
                        ex = new DataGridViewDataErrorEventArgs(null, e.ColumnIndex, e.RowIndex, DataGridViewDataErrorContexts.InitialValueRestoration);
                        dgvEdu_DataError(this, ex);
                        dgvEdu.CancelEdit();
                    }

                }

Here I am getting objRow.Cells["Total Marks"].Value null.
Can somebody give me answer why I am getting null?

Posted 19-Sep-14 19:22pm

Priyanka Tiwari001

Updated 19-Sep-14 20:04pm

ChauhanAjay

v3

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Comments

George Jonsson 20-Sep-14 2:33am

Cannot tell you much coz I know nothing about your grid view. Is the column name correct?
You need to use the debugger and check the value of objRow.Cells[e.ColumnIndex]

gggustafson 20-Sep-14 13:00pm

Ate you trying to match a decimal point? If so, use \. in the pattern.

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gggustafson · Answer 1 · 2014-09-20T07:39:00

Here's a revision to your code. Changed variable names to be meaningful. Replace the throw with your exception handler.

C#

// *********************************** education_DGV_CellLeave

void education_DGV_CellLeave (
                            object                    sender,
                            DataGridViewCellEventArgs e )
    {

    if ( e.ColumnIndex < 0 )
        {

        }
    else if ( String.IsNullOrEmpty (
                education_DGV.
                    Columns [ e.ColumnIndex ].HeaderText ) )
        {

        }
    else if ( !( education_DGV.
                     Columns [ e.ColumnIndex ].HeaderText.
                                               ToLower ( ).
                                               Trim ( ) ).
                 Equals ( "total marks" ) )
        {

        }
    else if ( e.RowIndex < 0 )
        {

        }
    else
        {
        string              cell_string = String.Empty;
        decimal             cell_value = -1.0M;

        cell_string = education_DGV [ e.RowIndex,
                                      e.ColumnIndex ].
                                          Value.
                                          ToString ( );
        if ( String.IsNullOrEmpty ( cell_string ) )
            {

            }
        else if ( !decimal.TryParse (     cell_string,
                                      out cell_value ) )
            {
            DataGridViewDataErrorEventArgs exception;

            exception = new DataGridViewDataErrorEventArgs (
                                null,
                                e.ColumnIndex,
                                e.RowIndex,
                                DataGridViewDataErrorContexts.
                                    InitialValueRestoration );
            education_DGV.CancelEdit ( );
            throw new DataException (
                String.Format (
                    "Data error  (column {0}, row {1})",
                    e.ColumnIndex,
                    e.RowIndex ) );
            }
        }
    }

Hope that helps.