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There is no row at position 0.it shows this error.

Posted by Sudheep.grandhe under C# on 12/14/2011 | Points: 10 | Views : 8041 | Status : [Member] | Replies : 6
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Hi,

in my combobox selectchangedevent it shows the following error."There is no row at position 0."

private void cmb_companyname_SelectedIndexChanged(object sender, EventArgs e)
{
int invoiceno=0;
if (cmb_companyname.SelectedValue.ToString() != "system.data.datarowview" && cmb_companyname.SelectedValue.ToString() != "" && cmb_companyname.SelectedValue.ToString() == string.Empty)
{
invoiceno = Convert.ToInt32(cmb_companyname.SelectedValue);
}
SqlConnection con = new SqlConnection("data source=mars-104;initial catalog=Sudheeptest;integrated security=true");
con.Open();
SqlCommand cmd=new SqlCommand ("select t2.compname,t2.compaddress,t2.invoiceno,t2.orderno,t2.ondate,t2.invoicedate,t2.amountstatus,t2.netamount,t2.netvat,t2.tamount,t1.particulars,t1.quantity,t1.perprice,t1.amount from tbl_report2 t2 left join tbl_report1 t1 on t1.invoiceno=t2.invoiceno where t2.invoiceno ="+invoiceno+ " ",con );
SqlDataAdapter da = new SqlDataAdapter(cmd);
ds = new DataSet();
da.Fill(ds);
if (ds.Tables.Count > 0)
{
txt_customeraddress.Text = ds.Tables[0].Rows[0]["compaddress"].ToString();//error shows here.
txt_invoiceno.Text = ds.Tables[0].Rows[0]["invoiceno"].ToString();
txt_orderno.Text = ds.Tables[0].Rows[0]["orderno"].ToString();
txt_invoicedate.Text = ds.Tables[0].Rows[0]["invoicedate"].ToString();
txt_ondate.Text = ds.Tables[0].Rows[0]["ondate"].ToString();
cmb_particulars.Text = ds.Tables[0].Rows[0]["particulars"].ToString();
txt_quantity.Text = ds.Tables[0].Rows[0]["quantity"].ToString();
txt_perprice.Text = ds.Tables[0].Rows[0]["perprice"].ToString();
txt_amount.Text = ds.Tables[0].Rows[0]["amount"].ToString();
txt_netamount.Text = ds.Tables[0].Rows[0]["netamount"].ToString();
txt_vat.Text = ds.Tables[0].Rows[0]["netvat"].ToString();
txt_totalamount.Text = ds.Tables[0].Rows[0]["tamount"].ToString();
if (Convert .ToString (ds .Tables [0].Rows [0]["amountstatus"])!=null && Convert .ToString (ds .Tables [0].Rows [0]["amountstatus"])!="")
{
if (ds .Tables[0].Rows [0]["amountstatus"].ToString().ToUpper ()=="PAID")
{
rb_paid .Checked =true ;
rb_unpaid .Checked =false ;
}
else
{
rb_unpaid .Checked =true ;
rb_paid .Checked =false ;
}
}

}

Best,
Sudheep.

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Responses

Posted by: Hmanjarawala on: 12/14/2011 [Member] Bronze | Points: 25

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change this condition 

if(ds.Tables.Count>0)

to 

if(ds.Tables.Count>0 && ds.Tables[0].Rows.Count>0)


this will fix ur error

Himanshu Manjarawala
Sr. Software Engineer@AutomationAnywhere
http://fieredotnet.wordpress.com/

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Posted by: Sksingh on: 12/14/2011 [Member] Starter | Points: 25

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Hi,

Put one more check along with if (ds.Tables.Count > 0)

it should be like below 

if (ds.Tables.Count > 0) 

{

 if(ds.Tables[0].Rows.Count > 0 )

{

//Write all your binding code here 

}

}


Regards,
Sunil

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Posted by: Sudheep.grandhe on: 12/14/2011 [Member] Starter | Points: 25

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Hi,

that was solved.but,it wont display the data.when i select value from combobox

Best,
Sudheep.

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Posted by: Sksingh on: 12/14/2011 [Member] Starter | Points: 25

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Fine, that means query itself would returns any record based on invoice no.
Check manually at server also whether data present at server for particual selected invoice no.

Regards,
Sunil

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Posted by: Sudheep.grandhe on: 12/14/2011 [Member] Starter | Points: 25

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Hi,

i want to display a text message before updating any value.it shows this error.

Error 17 Operator '==' cannot be applied to operands of type 'bool' and 'string'

private void btn_update_Click(object sender, EventArgs e)
{
if (txt_customeraddress.Text == txt_amount.Text == txt_invoicedate.Text == txt_invoiceno.Text == txt_netamount.Text == txt_ondate.Text == txt_orderno.Text == txt_perprice.Text == txt_quantity.Text == txt_totalamount.Text == txt_vat.Text == string.Empty)//error shows here
{
MessageBox.Show("please change the value before update");
}
else
{
SqlConnection con = new SqlConnection("data source=mars-104;initial catalog=Sudheeptest;integrated security=true");
SqlCommand cmd = new SqlCommand("update tbl_report2 set compname=@compname,compaddress=@compaddress,orderno=@orderno,ondate=@ondate,invoicedate=@invoicedate,amountstatus=@amountstatus,netamount=@netamount,tamount=@tamount where invoiceno=@id", con);
cmd.Parameters.AddWithValue("@compname", cmb_companyname.Text);
cmd.Parameters.AddWithValue("@compaddress", txt_customeraddress.Text);
cmd.Parameters.AddWithValue("@orderno", txt_orderno.Text);
cmd.Parameters.AddWithValue("@id", id);
if (txt_invoicedate.Text != null && txt_invoicedate.Text != "")
{
cmd.Parameters.AddWithValue("@invoicedate", txt_invoicedate.Text);
}
else
{
cmd.Parameters.AddWithValue("@invoicedate", DBNull.Value);
}
if (txt_ondate.Text != null && txt_ondate.Text != "")
{
cmd.Parameters.AddWithValue("@ondate", txt_ondate.Text);
}
else
{
cmd.Parameters.AddWithValue("@ondate", DBNull.Value);
}

cmd.Parameters.AddWithValue("@amountstatus", rb_paid.Checked);
cmd.Parameters.AddWithValue("@netamount", txt_netamount.Text);
cmd.Parameters.AddWithValue("@tamount", txt_totalamount.Text);
con.Open();
cmd.ExecuteNonQuery();
con.Close();
SqlConnection con1 = new SqlConnection("data source=mars-104;initial catalog=Sudheeptest;integrated security=true");
SqlCommand cmd1 = new SqlCommand("update tbl_report1 set compname=@compname,orderno=@orderno,invoicedate=@invoicedate,ondate=@ondate where invoiceid=@id", con1);
cmd1.Parameters.AddWithValue("@compname", cmb_companyname.Text);
cmd1.Parameters.AddWithValue("@orderno", txt_orderno.Text);
cmd1.Parameters.AddWithValue("@invoicedate", txt_invoicedate.Text);
cmd1.Parameters.AddWithValue("@ondate", txt_ondate.Text);
cmd1.Parameters.AddWithValue("@compaddress", txt_customeraddress.Text);
cmd1.Parameters.AddWithValue("@id", txt_invoiceno.Text);
con1.Open();
cmd1.ExecuteNonQuery();
con1.Close();
txt_amount.Text = "";
txt_customeraddress.Text = "";
txt_invoicedate.Text = "";
txt_invoiceno.Text = "";
txt_netamount.Text = "";
txt_ondate.Text = "";
txt_orderno.Text = "";
txt_perprice.Text = "";
txt_quantity.Text = "";
txt_totalamount.Text = "";
txt_vat.Text = "";
txt_vatpercentage.Text = "";
MessageBox.Show("updated successfully");
}


}

Best,
Sudheep.

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Posted by: Sksingh on: 12/14/2011 [Member] Starter | Points: 25

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Hi,

Try below code 

if (txt_customeraddress.Text == string.Empty && 

	txt_amount.Text == string.Empty && 

	txt_invoicedate.Text == string.Empty &&  

	txt_invoiceno.Text == string.Empty && 

	txt_netamount.Text == string.Empty && 

	txt_ondate.Text == string.Empty && 

	txt_orderno.Text == string.Empty && 

	txt_perprice.Text == string.Empty && 

	txt_quantity.Text == string.Empty && 

	txt_totalamount.Text == string.Empty && 

	txt_vat.Text == string.Empty)

{ 

MessageBox.Show("please change the value before update"); 

}


Regards,
Sunil

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