Covert string to boolean for checkbox in asp.net

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*.aspx

XML

<asp:templatefield HeaderText="Value">
    <itemtemplate>
        <asp:CheckBox ID="ckbValue" runat="server" Checked='<%# Eval("szValue") == DBNull.Value ? false : Convert.ToBoolean(Eval("szValue")) || Eval("szDefaultValue") == DBNull.Value ? false : Convert.ToBoolean(Eval("szDefaultValue"))%>' CssClass="pkchkbox" ></asp:CheckBox>
    </itemtemplate>
</asp:templatefield>

*.aspx.cs

C#

foreach (DataRow row in m_dt.Rows)
          {
              if (row[1].ToString() == "Y")
              {
                  row[1] = true;
                                  }
              else if (row[1].ToString() == "N")
                  row[1] = false;
          }

I wan to convert szValue and szDefaultValue that will display in one checkbox.
But it's not work.
Help me to solve my problem. thankyou

Posted 14-Dec-14 21:33pm

Member 10889447

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Comments

Kornfeld Eliyahu Peter 15-Dec-14 3:40am

Please elaborate on 'it's not work' - what? where?

Member 10889447 15-Dec-14 3:47am

<asp:CheckBox ID="ckbValue" runat="server" Checked='<%# Eval("szValue") == DBNull.Value ? false : Convert.ToBoolean(Eval("szValue")) || Eval("szDefaultValue") == DBNull.Value ? false : Convert.ToBoolean(Eval("szDefaultValue"))%>' CssClass="pkchkbox" >

This convert not work.
I want to convert szValue and szDefaultValue.

Kornfeld Eliyahu Peter 15-Dec-14 3:49am

What not work? You got error? You got μ instead of true or false? What?

Member 10889447 15-Dec-14 3:52am

nothing error. but can't convert string to boolean. Yeah i want got true or false from szValue or szDefaultValue.

Kornfeld Eliyahu Peter 15-Dec-14 4:08am

What the actual value of those strings?

Member 10889447 15-Dec-14 4:10am

"Y" and "N"

if "Y" convert to true
and "N" convert to false

2 solutions

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CPallini · Answer 1 · 2014-12-14T21:41:00

Solution 1

Quote:
But it's not work

That's not pretty informative. You should detail.

Your code is not robust, possibly you need to handle null values, possibly you have to trim the retrieved string, possibly you have to handle both "Y", "N" and everything else.

Posted 14-Dec-14 21:41pm

CPallini

Comments

Member 10889447 15-Dec-14 3:48am

<asp:CheckBox ID="ckbValue" runat="server" Checked='<%# Eval("szValue") == DBNull.Value ? false : Convert.ToBoolean(Eval("szValue")) || Eval("szDefaultValue") == DBNull.Value ? false : Convert.ToBoolean(Eval("szDefaultValue"))%>' CssClass="pkchkbox" >

that is not work, can't to convert.

Kornfeld Eliyahu Peter · Answer 2 · 2014-12-14T22:34:00

Convert.ToBoolean can not interpret any string - in fact it uses Boolean.Parse which have 'True' and 'False' as strings to interpret (case-insensitive)...
To convert other strings to Boolean you have to write your own code...One option is

C#

bool bVal = "Y".Equals(orgValue, StringComparison.OrdinalIgnoreCase);