how to print record on label using Linq Lambda expression

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// i m new for for Lambda expression and lurning it

C#

var getdata = dm.Cloths.Where(w => w.Cloth_No == txtvalue).Select(w => new { w.Cloth_Name, w.Cloth_Type });
           if (Enumerable.Count(getdata) > 0)
           {
               MessageBox.Show(????????);
// how can i print Cloth_Name and Cloth_Type in message box which  are in getdata  
           }

Posted 17-Nov-14 2:56am

mukesh mourya

Updated 17-Nov-14 3:54am

v2

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ZurdoDev 17-Nov-14 9:10am

You can use the debugging tools, such as the Watch window to see what getdata is.

2 solutions

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Nathan Minier · Accepted Answer · 2014-11-17T03:18:00

Solution 2

You want to formulate that a bit differently, and you have a typo. Assuming that you want to keep the list of anonymous objects around this method will work::

C#

var getdata = dm.Cloths.Where(w => w.Cloth_No == txtvalue).Select(w => new { w.Cloth_Name, w.Cloth_Type }).ToList();
           if (getdata.Any())
           {
               var sb = new StringBuilder();
               foreach(var item in getdata)
               {
                   sb.Append(item.Cloth_Name + " : " + item.Cloth_Type + "\n");
               }
               MessageBox.Show(sb.ToString()); 
           }

Posted 17-Nov-14 3:18am

Nathan Minier

Comments

mukesh mourya 17-Nov-14 9:56am

sorry is not "getdate", both are "getdata"

mukesh mourya 17-Nov-14 11:07am

sir...

here in yr solu. you Contain item in StringBuilder and use foreach loop.

if i want to print this are item on diffrent -diffrent Label like Cloth_Name on lblCloth_Name (Label) and Cloth_Type (Label) on lblCloth_Type without make foreach loop ,then how can i do that.

Nathan Minier 17-Nov-14 11:23am

Well, if you're expecting a single entry back from your query, that changes things.

Modify as follows:

var getdata = dm.Cloths.Where(w => w.Cloth_No == txtvalue).FirstOrDefault();
if (getdata.Any())
{
lblCloth_Name.Text = getdata.Cloth_Name;
lblCloth_Type.Text = getdata.Cloth_Type;
}

This will get exactly one (or none, if Cloth_No can't be found) results.

Nathan Minier 17-Nov-14 11:24am

Well, if you're expecting a single entry back from your query, that changes things.

Modify as follows:

var getdata = dm.Cloths.Where(w => w.Cloth_No == txtvalue).Select(w => new { w.Cloth_Name, w.Cloth_Type }).FirstOrDefault();
if (getdata.Any())
{
lblCloth_Name.Text = getdata.Cloth_Name;
lblCloth_Type.Text = getdata.Cloth_Type;
}

This will get exactly one (or none, if Cloth_No can't be found) results.

mukesh mourya 17-Nov-14 11:34am

sir....

here i got error in if (getdata.Any())

Nathan Minier 17-Nov-14 11:56am

My fault, since it's not enumerable anymore:
if(getdata != null)

mukesh mourya 17-Nov-14 12:05pm

thank you sir

BillWoodruff · Accepted Answer · 2014-11-17T03:13:00

Bug: change this: Enumerable.Count(getdate) > To: Enumerable.Count(getdata) >

You may also want to execute the query projection you build using 'new in Linq to transform it into a usable List:

var getdata = dm.Cloths.Where(w => w.Cloth_No == txtvalue).Select(w => new { w.Cloth_Name, w.Cloth_Type }).ToList();

Put a break-point on the if statement, and, when your application stops there: inspect the contents of 'getdata: whatever is available inside 'getdata is available for you to show in a MessageBox, converting to String if necessary.

'dmCloths is a collection of a Class ?