Converting Long Date To Short Date Format in Linq Query

[Sanket Patil]

Hi Richard, I am binding this query to datasource of ComboBox and adding DisplayMember and Valuemember to that Combobox. Well I am using C#.NET. The Date is Being Displayed on The ComboBox. The code is As Shown : CODE : cmbFinacialYear.DataSource = null; cmbFinacialYear.DataSource = (from n in logUserDc.mas_COMPANies where n.CM_COMP_ID == Convert.ToInt32(cmbCompanyName.SelectedValue) orderby n.CM_CODE descending select new { Sdate = " From : " + n.CM_ST_DATE + " - To : " + n.CM_END_DATE, Code = n.CM_CODE }); cmbFinacialYear.DisplayMember = "Sdate"; cmbFinacialYear.ValueMember = "Code"; cmbFinacialYear.SelectedIndex = -1; Here Sdate contains the result of the query which contains the date format that i dont want. Please Reply Soon. Thanks & Regards -- --- ---- Sanket. Patil

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[Lost User]

Sanket.Patil wrote:

Here Sdate contains the result of the query which contains the date format that i dont want.

Take a look at FormatString property on the ComboBox, it offers various default formats for DateTime, including the one that you are interested in.

[Sanket Patil]

Hi Richard, Thanks For Reply. I Tried on the solution you gave but the problem is the text of the ComboBox shows me the value as shown below:- " From : Apr 1 2010 12:00AM - To : Mar 31 2011 12:00AM ". Which I dont want. It Should Show me the text as follow:- " From : 1/Apr/2010 - To : 31/Mar/2011 ". So is it possible to convert the query result to the result that i want before providing displaymember to ComboBox. Please Reply.... Thanks & Regards -- --- ---- Sanket Patil

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[Lost User]

Sanket.Patil wrote:

So is it possible to convert the query result to the result that i want before providing displaymember to ComboBox.

My apologies, but I misread your original question, I assumed that you were adding DateTime objects to the ComboBox. In the statement

"(from n in logUserDc.mas_COMPANies where n.CM_COMP_ID == 1
select new { Sdate = "From :" + n.CM_ST_DATE + " - To " + n.CM_END_DATE, Code = n.CM_CODE });".

you need to format the two dates n.CM_ST_DATE and n.CM_END_DATE. Using String.Format() may be the better option than just concatenating from the ToString() methods.

[J4amieC]

assuming n.CM_ST_DATE and n.CM_END_DATE are actual DateTime instances and not already strings:

(from n in logUserDc.mas_COMPANies where n.CM_COMP_ID == 1
select new { Sdate = "From :" + n.CM_ST_DATE.ToString("MMM dd yyyy") + " - To " + n.CM_END_DATE.ToString("MMM dd yyyy"), Code = n.CM_CODE })

[Sanket Patil]

Hi J4amieC, Thanks For Your Help. But it Doesn't work. It Shows me the Error As Follow: " Method 'System.String ToString(System.String)' has no supported translation to SQL." So If There is any other method For This Please Reply. Thanks a lot For Your Reply Thanks & Regards -- --- ---- Sanket Patil

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[Sanket Patil]

Hi Richard, Thanks For Your Reply. But It doesn't work. It shows me the error as follows : " Could not translate expression 'Format("dd/MMM/yyyy", Convert(n.CM_END_DATE))' into SQL and could not treat it as a local expression." Please Reply me if you have any other option. Thanks once again for your reply. Thanks & Regards -- --- ---- Sanket Patil

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[J4amieC]

Sanket.Patil wrote:

So If There is any other method For This Please Reply.

Make sure those 2 fields are of type DATETIME when doing your SQL select.

[Lost User]

Sanket.Patil wrote:

So If There is any other method For This Please Reply.

Please post your code (between <pre></pre> tags) to show what you have written, we cannot verify things just from an error message.

[Sanket Patil]

Hi Richard, Here is my Code to Review :-

private void cmbCompanyName_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
cmbFinacialYear.DataSource = null;
cmbFinacialYear.DataSource = (from n in logUserDc.mas_COMPANies where n.CM_COMP_ID == Convert.ToInt32(cmbCompanyName.SelectedValue) orderby n.CM_CODE descending select new { Sdate = " From : " + n.CM_ST_DATE + " - To : " + n.CM_END_DATE, Code = n.CM_CODE });
cmbFinacialYear.DisplayMember = "Sdate";
cmbFinacialYear.ValueMember = "Code";
cmbFinacialYear.SelectedIndex = -1;
}
catch (Exception ex)
{
objcon.WriteLog("Login Master", "btnLogin_Click", ex);
}
}

Hope You will get better Solution From These. Thanks For Help..... Thanks & Regard -- --- ---- Sanket Patil

.

[Sanket Patil]

Hi J4amieC, Here is my code to review :-

private void cmbCompanyName_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
cmbFinacialYear.DataSource = null;
cmbFinacialYear.DataSource = (from n in logUserDc.mas_COMPANies where n.CM_COMP_ID == Convert.ToInt32(cmbCompanyName.SelectedValue) orderby n.CM_CODE descending select new { Sdate = " From : " + n.CM_ST_DATE + " - To : " + n.CM_END_DATE, Code = n.CM_CODE });
cmbFinacialYear.DisplayMember = "Sdate";
cmbFinacialYear.ValueMember = "Code";
cmbFinacialYear.SelectedIndex = -1;
}
catch (Exception ex)
{
objcon.WriteLog("Login Master", "btnLogin_Click", ex);
}
}

Hope you will find the better Solution From these. Thanks for the Help.... Thanks & Regards -- --- ---- Sanket Patil.

.

[Lost User]

You have posted the original code twice and in both cases you are creating Sdate as a concatenation of various fields including n.CM_ST_DATE. However this latter field will be returning its default ToString() method rather than the formatted version that you require. Try n.CM_ST_DATE.ToString("D"), or some alternate DateTime format string to get the date only. [EDIT]above should read n.CM_ST_DATE.ToString("d").[/EDIT]

modified on Tuesday, October 6, 2009 8:41 AM

[Sanket Patil]

Hi Richard, Thanks a lot for your help. The good news is i found the solution but not satisfied. Still the solution for now is best.Instead of getting result in "dd/MMM/yyyy" i am getting the result as "d/MM/yyyy". The Code I used for this is as Follows:- Previous Code :-

private void cmbCompanyName_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
cmbFinacialYear.DataSource = null;
cmbFinacialYear.DataSource = (from n in logUserDc.mas_COMPANies where n.CM_COMP_ID == Convert.ToInt32(cmbCompanyName.SelectedValue) orderby n.CM_CODE descending select new { Sdate = " From : " + n.CM_ST_DATE + " - To : " + n.CM_END_DATE, Code = n.CM_CODE });
cmbFinacialYear.DisplayMember = "Sdate";
cmbFinacialYear.ValueMember = "Code";
cmbFinacialYear.SelectedIndex = -1;
}
catch (Exception ex)
{
objcon.WriteLog("Login Master", "btnLogin_Click", ex);
}
}

And The Code I Made Changes is :-

private void cmbCompanyName_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
cmbFinacialYear.DataSource = null;
cmbFinacialYear.DataSource = (from n in logUserDc.mas_COMPANies where n.CM_COMP_ID == Convert.ToInt32(cmbCompanyName.SelectedValue) orderby n.CM_CODE descending select new { Sdate = " From : " + n.CM_ST_DATE.Day + "/" + n.CM_ST_DATE.Month + "/" + n.CM_ST_DATE.Year + " - To : " + n.CM_END_DATE.Day + "/" + n.CM_END_DATE.Month + "/" + n.CM_END_DATE.Year, Code = n.CM_CODE });
cmbFinacialYear.DisplayMember = "Sdate";
cmbFinacialYear.ValueMember = "Code";
cmbFinacialYear.SelectedIndex = -1;
}
catch (Exception ex)
{
objcon.WriteLog("Login Master", "btnLogin_Click", ex);
}
}

Hope You will be satisfy From this. Thanks For Help Thanks & Regards -- --- ---- Sanket. Patil

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[Lost User]

Well I don't know why you are making things more difficult for yourself. I suggested that you use n.CM_ST_DATE.ToString(formatstring) (where formatstring is a standard or custom date format string), which will provide everything and anything you need. Take a look at the documentation here on MSDN[^] for all the possibilities.

[J4amieC]

Richard MacCutchan wrote:

I suggested that you use n.CM_ST_DATE.ToString(formatstring)

As did I, more than 24 hours ago. This person is incapable of reading documentation or taking advice.. therefore I gave up. I suggest you do too.

[Lost User]

J4amieC wrote:

therefore I gave up. I suggest you do too.

I agree, very good advice. However I do live in the (somewhat vain) hope, that if I keep saying "look at MSDN", "try this", "use Google", "read a tutorial on CP" etc., some of these people may actually come to realize that they could probably solve 99% of their problems by the simple application of a little intelligence and hard work, rather than just posting questions here, then sitting back and waiting for the answer to drop in their lap.

[J4amieC]

Change this line:

cmbFinacialYear.DataSource = (from n in logUserDc.mas_COMPANies where n.CM_COMP_ID == Convert.ToInt32(cmbCompanyName.SelectedValue) orderby n.CM_CODE descending select new { Sdate = " From : " + n.CM_ST_DATE + " - To : " + n.CM_END_DATE, Code = n.CM_CODE });

to

cmbFinacialYear.DataSource = (from n in logUserDc.mas_COMPANies where n.CM_COMP_ID == Convert.ToInt32(cmbCompanyName.SelectedValue) orderby n.CM_CODE descending select new { Sdate = String.Format("From: {0:dd/MM/yyyy} - To: {1:dd/MM/yyyy}",n.CM_ST_DATE,n.CM_END_DATE), Code = n.CM_CODE });

Im not going to bother explaining why. I just want this question to die already.

[J4amieC]

You're right. So I took pity, and tried once more for a solution.

[J4amieC]

What a surprise, our OP just doesnt bother to respond to 2 serious answers.

[Lost User]

J4amieC wrote:

What a surprise, our OP just doesnt bother to respond to 2 serious answers.

Patience brother! ;)