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[英]Error C#: Index was out of range. Must be non-negative and less than the size of the collection
[英]excpetion error :Index was out of range. Must be non-negative and less than the size of the collection
我已經看到了所有異常錯誤,但我沒有遇到問題。 我有tblsecondary有streetId,streetName,fasileOne,fasileTwo。 當我在datagridviewcomboboxcolumn中選擇一個值時,我正在使用datagridview來填充行,但是它給了我一個異常錯誤:
指數超出范圍。 必須是非負數且小於集合的大小。
on dataGridView7 [e.RowIndex,2] .Value = drFound [“fasileOne”];
代碼是:
private void dataGridView7_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if ((e.RowIndex >= 0) && (e.ColumnIndex == 1)) // Assuming this is the streetId
{
int streetId = Convert.ToInt16(dataGridView7.Rows[e.RowIndex].Cells[e.ColumnIndex].Value);
DataRow drFound = tblSecondary.Rows.Find(streetId);
if (drFound == null)
{
MessageBox.Show("ddhhdhd");
}
else
{
dataGridView7[e.RowIndex, 2].Value = drFound["fasileOne"];
dataGridView7[e.RowIndex, 3].Value = drFound["fasileTwo"];
}
}
這是我使用的數據表:
public IncidentForm()
tblSecondary = new DataTable();
SqlCommand cmd2 = cnn.CreateCommand();
cmd2.CommandText = "select * from street";
SqlDataAdapter sdr2 = new SqlDataAdapter(cmd2);
cmd2.CommandType = CommandType.Text;
cmd2.Connection = cnn;
sdr2.Fill(tblSecondary);
tblSecondary.PrimaryKey = new DataColumn[] { tblSecondary.Columns["streetId"] };
}
問題是DataGridView上的索引器 。
第一個索引是ColumnIndex,第二個是RowIndex
dataGridView7[2, e.RowIndex].Value = drFound["fasileOne"];
dataGridView7[3, e.RowIndex].Value = drFound["fasileTwo"];
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