DataGridView clearing row error text

[Chuck P]

I have a DataGridView where the user can make changes.
When he goes to quit he can either save or discard the changes.

I don't know if this is the best way to do it but I wrote

(this.BindingSource.DataSource as DataSet).RejectChanges();

object tempDataSource =dataGridView1.DataSource;
dataGridView1.DataSource = null;
dataGridView1.DataSource = tempDataSource;

for (int i = 0; i < dataGridView1.Rows.Count; i++)
dataGridView1.Rows[i].ErrorText = "";

dataGridView1.Refresh();


The original values are back in the grid but the error text/icon
remains.


p.s. I know that if their is an error in the dataset that the error
automatically gets put in the dataGridView1.Rows[i].ErrorText and
that trying to clear it doesn't work. You have to clear it from the
datarowview. So maybe RejectChanges is not clearing the error text in
the dataset?

[Jeffrey Tan[MSFT]]

Hi Chuck ,

Yes, based on the RejectChanges method logic, it will only roll back the
data changes to the data, it will not reset the ErrorText on row or cells.

To clear the error icon of the DataGridView, we may clear all the ErrorText
in the datasource, then the error icon will disappear. This is because the
.Net winform databinding will update your changes in datasource into the UI
DataGridViewRow.ErrorText property. My testing code snippet is listed below:

DataTable dt = null;
private void Form1_Load(object sender, EventArgs e)
{
dt = new DataTable();
dt.Columns.Add("column1", typeof(int));
dt.Columns.Add("column2", typeof(string));
for (int i = 0; i < 5; i++)
{
DataRow dr = dt.NewRow();
dr["column1"] = i;
dr["column2"] = "item" + i.ToString();
dt.Rows.Add(dr);
}
dt.AcceptChanges();
this.dataGridView1.DataSource = dt;
}

private void button1_Click(object sender, EventArgs e)
{
this.dt.Rows[1].RowError = "abc";
}

private void button2_Click(object sender, EventArgs e)
{
dt.RejectChanges();
for (int i = 0; i < dt.Rows.Count; i++)
{
this.dt.Rows[i].RowError = "";
}

dataGridView1.Refresh();
}

This code snippet works well on my side. Hope this helps.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
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