The scope of this article was to create columns of check box in a GridView control. This GridView was created inside Repeater control. Please see the screen shot below.
Integration:
This article covers:
1. Creation of Template
2. Apply Template to GridView
Inner Working:
To add check box column to GridView we need to create template and apply it to column of GridView. Template created for GridView is:
//Access Row values of GridView
//Add client side event on click of check box
Integration:
This article covers:
1. Creation of Template
2. Apply Template to GridView
Inner Working:
To add check box column to GridView we need to create template and apply it to column of GridView. Template created for GridView is:
public class GridViewTemplate : ITemplate
{
//A variable to hold the type of ListItemType.
ListItemType _templateType;
//A variable to hold the column name.
string _columnName;
//Constructor where we define the template type and column name.
public GridViewTemplate(ListItemType type, string colname)
{
_templateType = type; //Stores the template type.
_columnName = colname; //Stores the column name.
}
void ITemplate.InstantiateIn(System.Web.UI.Control container)
{
switch (_templateType)
{
case ListItemType.Header:
//Creates a new label control and add it to the container.
Label lbl = new Label(); //Allocates the new label object.
lbl.Text = _columnName; //Assigns the name of the column in the lable.
//Adds the newly created label control to the container.
container.Controls.Add(lbl);
break;
case ListItemType.Item:
if (_columnName == m_sFareColumn || _columnName == m_sClassDate)
{
Label lblColValue = new Label();
lblColValue.DataBinding += new EventHandler(lblCols_DataBinding);
container.Controls.Add(lblColValue);
}
else
{
//Creates a new text box control and add it to the container.
CheckBox chkBox = new CheckBox();
chkBox.ID = Guid.NewGuid().ToString();
chkBox.ClientIDMode = ClientIDMode.Static;
//Attaches the data binding event.
chkBox.DataBinding += new EventHandler(chkBox_DataBinding);
//Adds the newly created textbox to the container.
container.Controls.Add(chkBox);
}
break;
}
}
/// <summary>
/// Function lblCols_DataBinding() will apply text to Class and Fare column label
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void lblCols_DataBinding(object sender, EventArgs e)
{
Label lblColValue = (Label)sender;
GridViewRow container = (GridViewRow)lblColValue.NamingContainer;
object dataValue = DataBinder.Eval(container.DataItem, _columnName);
if (dataValue != DBNull.Value)
{
lblColValue.Text = dataValue.ToString();
}
}
/// <summary>
/// Function chkBox_DataBinding() will apply text to check box
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void chkBox_DataBinding(object sender, EventArgs e)
{
CheckBox chkBox = (CheckBox)sender;
GridViewRow container = (GridViewRow)chkBox.NamingContainer;
object dataValue = DataBinder.Eval(container.DataItem, _columnName);
string Trainclass = ((System.Data.DataRowView)(container.DataItem)).Row.ItemArray[0].ToString();
string Trainfare = ((System.Data.DataRowView)(container.DataItem)).Row.ItemArray[7].ToString();
chkBox.Attributes.Add("onclick", "GetTrainSelection('" + _columnName +
"','" + dataValue.ToString() + "','" + Trainclass + "','" + Trainfare + "');");
//Set colour of text in check box based on values present inside it
if (dataValue != DBNull.Value)
{
chkBox.Text = dataValue.ToString();
if (dataValue.ToString().Contains("AVAILABLE"))
chkBox.ForeColor = System.Drawing.Color.Green;
else if (dataValue.ToString().Contains("RAC"))
chkBox.ForeColor = System.Drawing.Color.Red;
else if (dataValue.ToString().Contains("TRAIN CANCELLED"))
chkBox.Enabled = false;
else if (dataValue.ToString().Contains("NOT AVAILABL"))
chkBox.Enabled = false;
}
}
}
#endregion
Apply template to GridVeiw.
/// <summary>
/// FillUPGridView() function will fill a gridview dynamically for given train ID
/// </summary>
/// <param name="strTrianNo">Train number whose train details are going to get displayed</param>
/// <param name="gv_test">GridView that needs to be filled</param>
protected void FillUPGridView(string strTrianNo, GridView gv_test)
{
try
{
gv_test.HeaderStyle.BackColor = System.Drawing.Color.LightGray;
gv_test.HeaderStyle.ForeColor = System.Drawing.Color.Black;
DataTable dtTrain = new DataTable();
//Fill up dataTable with required value
dtTrain = GetTrainDetails(strTrianNo);
foreach (DataColumn col in dtTrain.Columns)
{
//Declare the bound field and allocate memory for the bound field.
TemplateField bfield = new TemplateField();
//Initalize the DataField value.
bfield.HeaderTemplate = new GridViewTemplate(ListItemType.Header, col.ColumnName);
//Initialize the HeaderText field value.
bfield.ItemTemplate = new GridViewTemplate(ListItemType.Item, col.ColumnName);
//Add the newly created bound field to the GridView.
gv_test.Columns.Add(bfield);
}
//Initialize the DataSource
gv_test.DataSource = dtTrain;
//Bind the datatable with the GridView.
gv_test.DataBind();
}
catch
{
}
}
