How to change the format of a column in GridView f

问题:

I have a GridView and I want to export it to Word. I want to change the format of one column to datetime format ("dd.MM.yyyy")

var grid = new GridView { DataSource = dt};
grid.DataBind();

In *.aspx page this is very easy, it looks like in the example below:

<asp:boundfield datafield="My_Date_Column"
                dataformatstring="{0:dd.MM.yyyy}"
                htmlencode="false" />

I want change format from c#, how to do this?

回答1:

If you want to alter the format of a column of a GridView from CodeBehind Add a RowDataBound to your grid view.

Then in the GridView_RowDataBound(object sender, GridViewRowEventArgs e) method, you'll be able to access e which will provide you with access to the individual cells of that row where you can specify a formatter.

Here's an example of using the RowDataBound event http://forums.asp.net/p/1589807/4025153.aspx

回答2:

String.Format("{0:dd.MM.yyyy}", myDateTimeInstance);

回答3:

I think the format of column is based in system current date time format.

But when converting to string you can do so

String str = dt[RowNumber][ColumnName].ToString("dd.MM.yyyy");

回答4:

DateTime dt = DateTime.Now;
String formated = dt.ToString("dd.MM.yyyy");

OR

String formated = String.Format("{0:dd.MM.yyyy}", dt );

回答5:

DateTime dt = DateTime.Now;
string formated = dt.ToString("dd.MM.yyyy");

Possible formats are shown in this MSDN article.

回答6:

In case you want to format the entire column then it would be better if you can set the property for your concerned column

gridview1.Columns[columnIndex].DataFormatString ="{0:dd.MM.yyyy}";

I think you will need to cast the column as BoundField to access the property.