e.value is null on CellValueChanged event on specific column in DevExpress XtraGrid c#

Question

I am updating the Cellvalue of grid in Winforms on CellValueChanged event and it is working very fine for my hundreds of grids but getting null value for the specific column. Below is my code

private void gvResults_CellValueChanged(object sender, DevExpress.XtraGrid.Views.Base.CellValueChangedEventArgs e)
{
    string t = e.Value.ToString();
    string low = null;
    low = gridView.GetFocusedRowCellValue(gvResults.Columns["ColumnName"]).ToString();
}

I have checked the following measurements after googling 1. FieldName Uniqueness

Please suggest a solution and correct me if i am doing something wrong.

Thanks in advance

have you looked at the DevExpress documentation https://documentation.devexpress.com/#WindowsForms/DevExpressXtraGridViewsBaseColumnView_GetFocusedRowCellValuetopic(vb2Cmw) your issue is the following `This issue occurs because the GetFocusedRowCellValue method is of the object type that cannot be implicitly converted to the type of the TextEdit.Text property that is String.` — MethodMan, Jan 08 '16 at 20:02
its not about GetFocusedRowCellValue, its about CellValueChanged event returning null value. you see, e.value in the first line getting the null value on my specific column but rest of all it is doing great. — Arslan Elahi, Jan 08 '16 at 20:10
no that's Implicit not Explicit.. explicit would be `Convert.ToString()` it's casing is what your thinking...in the debugger what property's of `e` do you see when you set a breakpoint on the second line..? — MethodMan, Jan 08 '16 at 20:14
look at this link as well - https://documentation.devexpress.com/#WindowsForms/DevExpressXtraGridViewsBaseColumnView_CellValueChangedtopic — MethodMan, Jan 08 '16 at 20:21

score 1 · Accepted Answer · answered Jan 11 '16 at 13:04

1

Got the solution finally and it is If you bound the column with the grid then you need to add that column in the Datatable as well which you're assigning as DataSource to the Grid.

answered Jan 11 '16 at 13:04

Arslan Elahi

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score 0 · Answer 2 · answered Jan 08 '16 at 20:06

0

what happens if you try this

private void gvResults_CellValueChanged(object sender, DevExpress.XtraGrid.Views.Base.CellValueChangedEventArgs e)
{
    string t = e.Value.ToString();
    string low = string.Empty;
    low = (string)gridView.GetFocusedRowCellValue( (string)gvResults.Columns["ColumnName"]);
}

answered Jan 08 '16 at 20:06

MethodMan

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this can be used to avoid exception but if value is null then what would do with it ? – Arslan Elahi Jan 08 '16 at 20:09
you can check using the string.IsNullOrEmpty or change the `string low = default(string);` – MethodMan Jan 08 '16 at 20:11

e.value is null on CellValueChanged event on specific column in DevExpress XtraGrid c#

2 Answers2