Error converting data type nvarchar to datetime.

See more:

ASP.NET

for insert a record into table error will occured "Error converting data type nvarchar to datetime."
this is my code

SqlConnection con = new SqlConnection(cn.ConnectionStrings);
SqlCommand cmd1 = new SqlCommand();
cmd1.CommandType = CommandType.StoredProcedure;
cmd1.Parameters.AddWithValue("@ButtonFlag", "Save");
cmd1.Parameters.AddWithValue("@OwnId", txtOwner.Text.Trim());
cmd1.Parameters.AddWithValue("@ProductName", txtProdNm.Text.Trim());
cmd1.Parameters.AddWithValue("@PGroId", ddlProdGroup.SelectedItem.Value);
cmd1.Parameters.AddWithValue("@Manufacture", txtManufacture.Text.Trim());
cmd1.Parameters.AddWithValue("@Website", txtWebsite.Text.Trim());
cmd1.Parameters.AddWithValue("@LastPrice", txtLastPrice.Text.Trim());
cmd1.Parameters.AddWithValue("@UnitPrice", txtUnitPrice.Text.Trim());
cmd1.Parameters.AddWithValue("@Unit",ddlUnit.SelectedItem.Text);
cmd1.Parameters.AddWithValue("@Description", txtDesc.Text.Trim());
cmd1.Parameters.AddWithValue("@ActualCost", txtActCost.Text.Trim());
cmd1.Parameters.AddWithValue("@ManufactureDate",txtManufacture.Text);
cmd1.Parameters.AddWithValue("@ExpiryDate",txtExpiryDate.Text);
cmd1.Parameters.AddWithValue("@SupportExipryDate",txtSuppExpiryDate.Text);
cmd1.Parameters.AddWithValue("@Date",txtDate.Text);
cmd1.Parameters.AddWithValue("@TaxRate", txtTaxRate.Text.Trim());
cmd1.Parameters.AddWithValue("@Stock",txtStock.Text.Trim());
cmd1.Parameters.AddWithValue("@VenId", txtVendor.Text.Trim());
cmd1.CommandText = "[dbo].[ProductProcedure]";
cmd1.Connection = con;
con.Open();
SqlDataAdapter adp = new SqlDataAdapter(cmd1);
DataTable dt = new DataTable();
adp.Fill(dt);
ScriptManager.RegisterStartupScript(this, this.GetType(), "alert User", "alert('Record Save Successfully..!!')", true);
con.Close();