Checking Boolean value

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Hi,

How to check the boolean value through Eval function and set it to enabled property of a button in grid view.

I have tried something below

<asp:Button ID="btnEmail" Text="Send" runat="server" CommandArgument='<%#Eval("CandidateId")%>' Enabled='<%#(Eval("IsEmail").ToString().Equals("0"))?"false":"true" %>'   CommandName="Email" />

But it shows error "Cannot convert type string to bool"

Please help me.

I have tried other way round by finding the button control on rowdatabound event of grid view but then also I could not achieve the desired output.

Your suggestions much appreciated.

regards
Azeem

Posted 13-Apr-12 23:00pm

Ahamed Azeem

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2 solutions

Solution 1

Hi,
Try this code:

ASP.NET

<asp:button id="btnEmail" text="Send" runat="server" commandargument='<%# IsEnabled(Eval("IsEmail")) %>' commandname="Email" />

and in your code behind write this method:

C#

public bool IsEnabled(object isEmail)
{
   return isEmail.ToString().Equals("0");
}

Cheers

Posted 14-Apr-12 0:11am

Reza Ahmadi

Updated 14-Apr-12 4:12am

v2

Comments

Ahamed Azeem 14-Apr-12 9:50am

Hi,

Thanks for your reply

Your function seems to be okay but for ex if I have 2 rows in a datatable and return 0 and another return 1, but both buttons on the grid view is disabled.

What may be the issue

regardss

Reza Ahmadi 14-Apr-12 10:16am

I do not know the detail of your implementation to enable/disable buttons but Your question was to get rid of "Cannot convert type string to bool" error, which above code works fine.

Ahamed Azeem 14-Apr-12 10:29am

Hello,

I have tried below code as well but the result was same as before.

protected void grdApplicants_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (!IsPostBack)
{
DataTable dtApplicants = ((DataTable)Session["dtApplicants"]);
if (e.Row.RowType == DataControlRowType.DataRow)
{

for (int i = 0; i <= dtApplicants.Rows.Count - 1; i++)
{
Boolean IsEmail = Convert.ToBoolean(dtApplicants.Rows[i]["IsEmail"]);

Button btnSend = (Button)e.Row.FindControl("btnEmail");
if (IsEmail)
{
btnSend.Enabled = false;
}
else
{
btnSend.Enabled = true;
}
}
}
}
}

Ahamed Azeem 15-Apr-12 0:03am

Hello Anyone,

Could you please help me to sort out this issue. I am running behind this issue for last few days.

regards

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Ahamed Azeem · Accepted Answer · 2012-04-14T18:45:00

Solution 2

Just some changes in the markup did the job, no need of other events in the code behind

below is the code for your reference

Enabled='<%# (Boolean.Parse(Eval("IsEmail").ToString())? Boolean.Parse("false"): Boolean.Parse("true"))%>'

regards

Posted 14-Apr-12 18:45pm

Ahamed Azeem