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DatePicker Cell Disappearing

Hai

I had added a DateTimePicker Excataly like in this url [ http://msdn2.microsoft.com/en-us/library/7tas5c80.aspx ] .

My problem is while. I had setted the allowadding property of the DataGridView to true, and i binded the DataGridView with dataset. While trying to add data in the rows of the grid manually. DateTimePicker will disappear and the DataTimePicker value will return like this [ this.value = {} ].

If anybody have any solution for this. Please help me.

Thanks and Regards

Rajeev

Raj - WebDev Raj Tuesday, July 03, 2007 11:25 AM

Hi rajeev,

Try to change the InitializeEditingControl Method in the CalendarCell Class to this:

Code Snippet

publicoverride void InitializeEditingControl(int rowIndex, object

initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)

{

// Set the value of the editing control to the current cell value.

base.InitializeEditingControl(rowIndex, initialFormattedValue,

dataGridViewCellStyle);

CalendarEditingControl ctl =

DataGridView.EditingControl as CalendarEditingControl;

if (this.Value.ToString() != "")

ctl.Value = (DateTime)this.Value;

else

ctl.Value = DateTime.Now;

}

Hope this helps.

Regards

Rong-Chun Zhang Wednesday, July 04, 2007 10:43 AM

Hi rajeev,

Try to change the InitializeEditingControl Method in the CalendarCell Class to this:

Code Snippet

publicoverride void InitializeEditingControl(int rowIndex, object

initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)

{

// Set the value of the editing control to the current cell value.

base.InitializeEditingControl(rowIndex, initialFormattedValue,

dataGridViewCellStyle);

CalendarEditingControl ctl =

DataGridView.EditingControl as CalendarEditingControl;

if (this.Value.ToString() != "")

ctl.Value = (DateTime)this.Value;

else

ctl.Value = DateTime.Now;

}

Hope this helps.

Regards

Rong-Chun Zhang Wednesday, July 04, 2007 10:43 AM

Hai

Thanks, i done that by setting a DefaultCellStyle.NullValue to the DataGridView cell and in the date picker cell, if this.value == Db null.value i make the this.value as the current date. i passed the Null value to cell also as also Current Date .

One Common problem with the DateTimePicker Cell is, when i change the format of the date. Suppose if i change the format to dd/MM/yyyy . we can't compare the date inside the DataGridView cell with the any date inside the form . dam things always try to pass back the date as what format we are providing.

Do u have any solution for this ?

Thanks and Regards
Rajeev

Raj - WebDev Raj Thursday, July 05, 2007 5:51 AM

Hi Rajeev,

I have tested it. It worked here.Could you show some code about how you compare the date. Below is the codeI am used.

Code Snippet

DateTime celltime = DateTime.Parse(this.dataGridView1[1, this.dataGridView1.CurrentCell.RowIndex].Value.ToString());

int a = DateTime.Compare(DateTime.Now, celltime);

MessageBox.Show(a.ToString());

Hope this helps.

Regards

Hai

Thanks. My problem is while parsing the date time with different format, in the DataGridView cell and with the date in the DateTimePicker. What happening is in both controls the date format is dd/MM/yyyy. Date picker will parse the correct datetime while comparing, but the date in the DataGridView cell will pass a string like d/M/yyyy or dd/MM/yyyy. so every time it will error. String cannot be regonised as a valid date time. if the date format is in default format it won't create any problem.

Regards and Thanks in Advance
Rajeev

Raj - WebDev Raj Friday, July 06, 2007 5:59 AM

Hi Rajeev,

I have tested it using the format string like 'd/M/yy', it worked well. When I use theDataGridViewCell.FormattedValue,I encounter the same error as you. So I guess you did not use the DataGridViewCell.Value.

Hope this helps.

Regards

Rong-Chun Zhang Friday, July 06, 2007 8:41 AM

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