"Input string was not in a correct format."

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C#

protected void btnUpload_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
    {
        DataSet ds = new DataSet();


        int LastId;
        ds=DB.ExecuteQuery("SelectPreviousId");
        LastId = Convert.ToInt32(ds.Tables[0].Columns[0].ToString());

        //string filename = System.IO.Path.GetFileName(btnUpload.FileName);
        btnUpload.SaveAs(Server.MapPath(this.UploadFolderPath) + LastId);

    }

This is code for async fileupload
i reterive last inserted id+1 values using sp and save my image as id in solution explorer

but it is showing the error
"Input string was not in a correct format."

LastId = Convert.ToInt32(ds.Tables[0].Columns[0].ToString()); error line

Posted 1-Oct-13 20:21pm

Mohammed Shamsheer

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Dholakiya Ankit · Answer 1 · 2013-10-01T20:32:00

Solution 1

Try this one
Certainly it seams that you don't have return type int so this error occurs

C#

LastId = Convert.ToInt32(ds.Tables[0].Columns[0].ToString()==""?"0":ds.Tables[0].Columns[0].ToString());

This may help you

or

Inspect it properly and coonfirm that there is not string value return type

regards.....:)

Posted 1-Oct-13 20:32pm

Dholakiya Ankit

Comments

Mohammed Shamsheer 2-Oct-13 2:37am

i try this but this also not working

Dholakiya Ankit 2-Oct-13 2:47am

Still same error occurs? and what you getting value when you are getting error show me full details

Mohammed Shamsheer 2-Oct-13 3:08am

its solved ...just i changed my code to ds.tables[0][0].tostring();
thanks for ur answer...

Dholakiya Ankit 2-Oct-13 3:09am

Okay

Singh Gyan · Answer 2 · 2013-10-02T01:30:00

Solution 2

You are missing the row attributes in your table.
use soething like this table[][]

-SG

Posted 2-Oct-13 1:30am

Singh Gyan