how to display records(search records)when selecting a value from dropdown list and values should be displayed in texbox?

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how to display records(search a records)when selecting a value from dropdown list and values should be displayed in texbox after button click?

Posted 14-Feb-12 21:47pm

ythisbug

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CRDave1988 15-Feb-12 3:54am

what u have done so far? where u facing problem?

ythisbug 15-Feb-12 4:02am

is it in correct format???m getting error like object reference is not set to an instance of an object..

protected void imgbtnSearch_Click(object sender, ImageClickEventArgs e)
{
SearchTestCasePL stPL = new SearchTestCasePL();
stPL.TID = ddlTestCase.SelectedItem.Text;

SearchTestCaseBLL stBLL = new SearchTestCaseBLL();
DataTable dt = new DataTable();
dt = stBLL.SearchTestCase(stPL);

if (dt.Rows.Count > 0)
{
txtBuildNo.Text = dt.Rows[0]["BuildNo"].ToString();
txtTestCase.Text = dt.Rows[0]["TID"].ToString();
ddlStatus.SelectedItem.Text = dt.Rows[0]["Status"].ToString();
txtSDate.Text = dt.Rows[0]["StarDate"].ToString();
txtEDate.Text = dt.Rows[0]["EndDate"].ToString();
txtExecution.Text = dt.Rows[0]["ExecutionTime"].ToString();
}

this s my code..when i slect single items from drop downs and click search button i want to show tat records in textbox..perticular items record..understood??

CRDave1988 15-Feb-12 4:06am

ok but what problem u r facing code dose not affect or Exception is thrown, or function is not called or anything else.

ythisbug 15-Feb-12 4:18am

code dose not affect and function is not calld.

CRDave1988 15-Feb-12 4:22am

put debug point on line 'if (dt.Rows.Count > 0)' and see what value is stored in dt is it contain value or not.

ythisbug 15-Feb-12 4:30am

but m not getting value for ddlStatus.SelectedItem.text

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**AmitGajjar** · Answer 1 · 2012-02-14T23:18:00

Hi,

if you are getting object reference exception, one of the cause is you are trying to convert null value into ToString.

as you can see in your code

C#

txtBuildNo.Text = dt.Rows[0]["BuildNo"].ToString();

should be changed with

C#

txtBuildNo.Text = Convert.ToString(dt.Rows[0]["BuildNo"]);

similarly check all the casting properly for this exception resolution.

hope this will solve your problem.

thanks
-amit.