Specified cast is not valid.

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C#

if (DtMain.ToString().Substring(0, 5) == drNameShow.GetString(3).Substring(0, 5))
                {
                    lblPname.Location = new Point(32, 2 + iLblSme);
                    objMain.panNameMain.Controls.Add(this.lblPname);
                    objMain.lblDate.Text = DtMain.ToString().Substring(0, 10);
                    iLblSme = iLblSme + 20;
                    boolSmeDay = true;
                }

it gives error as "Specified cast is not valid."

Posted 7-Aug-12 23:47pm

16041984

Updated 7-Aug-12 23:49pm

Prasad_Kulkarni

v2

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Comments

Philip Stuyck 8-Aug-12 5:52am

at what line. I don't see any casting here in this code. Your problem might be elsewhere.

16041984 8-Aug-12 5:59am

on if statement it gives error if (DtMain.ToString().Substring(0, 5) == drNameShow.GetString(3).Substring(0, 5))
plz help.i m newbie

16041984 8-Aug-12 5:54am

on if statement it gives error
if (DtMain.ToString().Substring(0, 5) == drNameShow.GetString(3).Substring(0, 5))

Prabhakaran Soundarapandian 8-Aug-12 5:54am

Which line you are getting error while debugging?

16041984 8-Aug-12 5:59am

on if statement it gives error if (DtMain.ToString().Substring(0, 5) == drNameShow.GetString(3).Substring(0, 5))
plz help.i m newbie

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Prabhakaran Soundarapandian · Accepted Answer · 2012-08-07T23:58:00

Solution 1

if drNameShow is datareader means try the below code.

C#

string mystring = drNameShow["columnName"].ToString();
if (DtMain.ToString().Substring(0, 5) == mystring.Substring(0, 5))

Posted 7-Aug-12 23:58pm

Prabhakaran Soundarapandian

Comments

16041984 8-Aug-12 6:03am

it's working also i have error on code
if ((DtAdv1.ToString().Substring(0, 5) == drNameShow.GetString(3).Substring(0, 5)) || (DtAdv2.ToString().Substring(0, 5) == drNameShow.GetString(3).Substring(0, 5)))
{

Prabhakaran Soundarapandian 8-Aug-12 6:09am

do the same like above what you did and compare..

16041984 8-Aug-12 6:16am

thx now it's working
thx to Prabhakaran Soundarapandian sir

Prabhakaran Soundarapandian 8-Aug-12 6:18am

Welcome!!!