System.Data.OleDb.OleDbException: 'Data type mismatch in criteria expression.' Grid view update - sql

Question

I am working on a grid view update but System.Data.OleDb.OleDbException: 'Data type mismatch in criteria expression error. Please someone help.
protected void ResultGridView_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
TextBox txtFName2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtFName");
TextBox txtDate2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtSM");
TextBox txtCaseType2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtCaseType");
TextBox txtFileno2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtFileno");
TextBox txtCustName2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtCustName");
TextBox txtAddress2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtCustName");
TextBox txtConno2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtConno");
TextBox txtPlotarea2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtPlotarea");
TextBox txtPlotRate2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtPlotRate");
TextBox txtconstarea2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtconstarea");
TextBox txtConstFloor2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtConstFloor");
TextBox txtconstrate2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtconstrate");
TextBox txtPlotvalue2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtPlotvalue");
TextBox txtconstvalue2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtconstvalue");
TextBox txttotalvalue2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txttotalvalue");
TextBox txtRemarks2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtRemarks");
**TextBox txtDatee2 = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtDate2");**
string da = txtDatee2.Text.ToString();
DateTime dt =
DateTime.ParseExact(da, "dd-MM-yyyy HH:mm:ss", CultureInfo.InvariantCulture);
string dateshort = dt.ToShortDateString();
string ID = ResultGridView.DataKeys[e.RowIndex].Values[0].ToString();
cmd.Connection = conn;
cmd.CommandText = "UPDATE Final SET Finance ='" + txtFName2.Text + "' ,SM ='" + txtDate2.Text + "',Case_Type ='" + txtCaseType2.Text + "',File_no ='" + txtFileno2.Text + "',Cust_Name ='" + txtCustName2.Text + "' ,Address ='" + txtAddress2.Text + "',Con_no ='" + txtConno2.Text + "' ,Plot_area ='" + txtPlotarea2.Text + "' ,Plot_Rate ='" + txtPlotRate2.Text + "' ,const_area ='" + txtconstarea2.Text + "' ,Const_Floor ='" + txtConstFloor2.Text + "' ,const_rate ='" + txtconstrate2.Text + "' ,Plot_value ='" + txtPlotvalue2.Text + "' ,const_value ='" + txtConno2.Text + "' ,total_value ='" + txttotalvalue2.Text + "' ,Remarks ='" + txtRemarks2.Text + "'**,Date2 = '"+ dateshort +"'** WHERE ID=" + ID + "";
conn.Open();
cmd.ExecuteNonQuery();
ResultGridView.EditIndex = -1;
FillVendorGrid();
conn.Close();
}

Answer 1

At least, first text expressions for date values should be formatted as to the ISO sequence:
string dateshort = dt.ToString("yyyy'/'MM'/'dd");
second, in Access, these must be wrapped in octothorpes:
"', Date2 = #" + dateshort + "# WHERE ID="
This must be modified for other datetime fields as well.
Or, do your self a big favour and turn to call a parameterised query.