How to create dynamic Gridview ?
Many times we have the requirement where we have to create columns dynamically.
This article describes you about the dynamic loading of data using the DataTable as the datasource.
Details of the Grid
Let?s have a look at the code to understand better.
Create a gridview in the page,
Drag and drop the GridView on to the page
Or
Manually type GridView definition in the page.
public partial class _Default : System.Web.UI.Page
{
#region constants
const string NAME = "NAME";
const string ID = "ID";
#endregion
protected void Page_Load(object sender, EventArgs e)
{
loadDynamicGrid();
}
private void loadDynamicGrid()
{
#region Code for preparing the DataTable
//Create an instance of DataTable
DataTable dt = new DataTable();
//Create an ID column for adding to the Datatable
DataColumn dcol = new DataColumn(ID ,typeof(System.Int32));
dcol.AutoIncrement = true;
dt.Columns.Add(dcol);
//Create an ID column for adding to the Datatable
dcol = new DataColumn(NAME, typeof(System.String));
dt.Columns.Add(dcol);
//Now add data for dynamic columns
//As the first column is auto-increment, we do not have to add any thing.
//Let's add some data to the second column.
for (int nIndex = 0; nIndex < 10; nIndex++)
{
//Create a new row
DataRow drow = dt.NewRow();
//Initialize the row data.
drow[NAME] = "Row-" + Convert.ToString((nIndex + 1));
//Add the row to the datatable.
dt.Rows.Add(drow);
}
#endregion
//Iterate through the columns of the datatable to set the data bound field dynamically.
foreach (DataColumn col in dt.Columns)
{
//Declare the bound field and allocate memory for the bound field.
BoundField bfield = new BoundField();
//Initalize the DataField value.
bfield.DataField = col.ColumnName;
//Initialize the HeaderText field value.
bfield.HeaderText = col.ColumnName;
//Add the newly created bound field to the GridView.
GrdDynamic.Columns.Add(bfield);
}
//Initialize the DataSource
GrdDynamic.DataSource = dt;
//Bind the datatable with the GridView.
GrdDynamic.DataBind();
}
}
What types of data validation events are commonly seen in the client-side form validation?
Required Field Validator
In A Page I have grid view with Options of select and delete using hyperlink when I am selecting any one of then it has to open another page how can it
Ans 1: You can have template column for select and delete instead of the databound column. In which you can mention the destination page where you need to navigate.
Ans 2: Using RowDataBound event, you can add attribute to the select and delete hyperlink like:
e.Row.Cells(CellPosition).Controls(0).Attributes.Add("OnClick","return fnJavascriptFunction()")
e.Row.Cells(CellPosition).Controls(0).Attributes.Add("OnClick","return fnJavascriptFunction('"& If any argument &"')").
Web service support a) Data set b) dataReader c) both of above d) none of above
a) Data set
