DataTable internal index is corrupted: '5' from row = ((DataRowView)this.regexDgv.CurrentRow.DataBoundItem).Row; RRS feed

  • Question

  • how can I get rid of this index error?

    does (DatatRowView) causes write operation on the table?

    Wednesday, August 14, 2019 5:59 AM

All replies

  • Hi fs-ab,

    Thank you for posting here.

    I try to use the following code to reproduce your problem, but failed.

    private void Form1_Load(object sender, EventArgs e)
                DataTable dt = new DataTable();
                dt.Columns.Add("Name", typeof(string));
                dt.Columns.Add("Age", typeof(int));
                dt.Rows.Add("Test1", 22);
                dt.Rows.Add("Test2", 23);
                this.dataGridView1.DataSource = dt;
            private void Button1_Click(object sender, EventArgs e)
                var data = ((DataRowView)this.dataGridView1.CurrentRow.DataBoundItem).Row;

    I get the normal result instead of the exception.

    Therefore, I hope that you could provide a completed code.

    Best Regards,


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    Wednesday, August 14, 2019 6:54 AM
  • Thx for replying.

     the datagridview is bounded to a microsoft sql express database table not a stand alone table in memory

      private void regexBindingNavigatorSaveItem_Click(object sender, EventArgs e)
       bNavigatorSaveItemInProgress = true;
       regexBindingNavigatorSaveItem.Enabled = false;  // avoid unnecessary repeat from validate event
       setStatus("Start saving" + regexTextBox.Text);

       if (!this.Validate())
       { // 100822 added:
        addMsg("Not saved due to failed validation - make sure there is value for group, regexname and regex\r\nTO cancel change  use the Cancel chane (Crossed ED button) or complete reload");

       DataRow row; try // 100805 added exception handling from save after del of last row { row = ((DataRowView)this.regexDgv.CurrentRow.DataBoundItem).Row; //090903 } catch (IndexOutOfRangeException eIor) { MessageBox.Show(eIor.Message + "\r\nstack trace" + eIor.StackTrace , "regexBindingNavigatorSaveItem_Click error - should reload to avoid corruption"); return; //row = ((DataRowView)this.regexDgv.CurrentRow).Row; } catch (InvalidOperationException eioe) { MessageBox.Show(eioe.Message, "regexBindingNavigatorSaveItem_Click - please reload"); return; }

    • Edited by fs - ab Wednesday, August 14, 2019 5:47 PM
    Wednesday, August 14, 2019 5:35 PM
  • Here is a different approach using mocked data to keep things simple.

    using System;
    using System.Data;
    using System.Windows.Forms;
    namespace WindowsFormsApp1
        /// <summary>
        /// DataGridView columns are defined in the
        /// designer of the DataGridView
        /// </summary>
        public partial class Form1 : Form
            private BindingSource _bindingSource = 
                new BindingSource();
            public Form1()
            private void Form1_Load(object sender, EventArgs e)
                var dt = new DataTable();
                dt.Columns.Add(new DataColumn()
                    { ColumnName = "FirstName", DataType = typeof(string)});
                dt.Columns.Add(new DataColumn()
                    { ColumnName = "LastName", DataType = typeof(string)});
                dt.Rows.Add("Karen", "Payne");
                dataGridView1.AllowUserToAddRows = false;
                dataGridView1.AutoGenerateColumns = false;
                _bindingSource.DataSource = dt;
                dataGridView1.DataSource = _bindingSource;
            private void button1_Click(object sender, EventArgs e)
                if (dataGridView1.CurrentRow == null) return;
                var row = ((DataRowView) _bindingSource.Current).Row;
                var firstName = row.Field<string>("FirstName");
                var lastName = row.Field<string>("LastName");
                MessageBox.Show($"{firstName} {lastName}");

    Please remember to mark the replies as answers if they help and unmarked them if they provide no help, this will help others who are looking for solutions to the same or similar problem. Contact via my Twitter (Karen Payne) or Facebook (Karen Payne) via my MSDN profile but will not answer coding question on either.

    NuGet BaseConnectionLibrary for database connections.

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    Wednesday, August 14, 2019 5:51 PM