Develop Reference

unable to retain the values for dynamic creation of grid rows after print

i have a gridview in which i have created dynamic rows in row created event as shown in below code.
protected void grdPBook_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
strPreviousRowID = DataBinder.Eval(e.Row.Date).ToString()}
grdPBook.ShowFooter = false;
}
}
protected void grdPBook_RowCreated(object sender, GridViewRowEventArgs e)
{
bool IsSubTotalRowNeedToAdd = false;
bool IsGrandTotalRowNeedtoAdd = false;
if (ddlSummary.SelectedValue == "0")
{
if ((strPreviousRowID != string.Empty)(DataBinder.Eval(e.Row.DataItem,Date) != null))
{
if (strPreviousRowID != DataBinder.Eval(e.Row.DataItem, Date).ToString())
{
if (ddlSummary.SelectedValue == "0")
{
IsSubTotalRowNeedToAdd = true;
}
}
}
if (IsSubTotalRowNeedToAdd)
{
// ---code for adding dynamic subtotal row-----
}
}
}
when i print the grid the print dialog opens and after closing the dialog the dynamically generated columns of grid disappers and the grid gets messed up coz i m not able to retain the values for Date(here)on the basis of which the dynamic rowsare generated.
How can i achieve the task.Help me.

protected void grdPBook_RowCreated(object sender, GridViewRowEventArgs e)
{
// your code
if (ddlSummary.SelectedValue == "0")
{
//your code
grdPBook.DataSource = dt;
//here dt is your Data Table object containing all rows.
}
grdPBook.DataBind();
}
Use grdPBook.DataBind(); in every Row operations.

Get DataGridView checkbox value after changed

i have DataGridView with several columns, every Row represent my object with several properties like name, id etc.
after change my Name column Checkbox i want to update my object
How can i get my column Checknox state ?
This is what i have try:
private void dataGridView1_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
if (dataGridView1.IsCurrentCellDirty)
{
dataGridView1.CommitEdit(DataGridViewDataErrorContexts.Commit);
}
}
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (dataGridView1.Columns[e.ColumnIndex].Name == "Name")
{
}
}

I assume Name is the name of DataGridViewCheckBoxColumn
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (dataGridView1.Columns[e.ColumnIndex].Name == "Name")
{
var isChecked = dataGridView1[e.ColumnIndex, e.RowIndex].Value as bool? ?? false;
//rest of logic
}
}
this is the simplest and safest way.
To iterate through all cells in row use this code:
DataGridViewRow row = dataGridView1.Rows[e.RowIndex];
foreach (DataGridViewCell cell in row.Cells)
{
object value = cell.Value;
}

Maybe you can use the FindControl() to get the state of checkbox:
CheckBox cbName = (CheckBox)dataGridView1.Columns[e.ColumnIndex].FindControl("cbName");
checkState = cbName.CheckState.toString();
or
isChecked = cbName.Checked;

How to access parameter from Client Script

I have a Gridview and on rowDatabound i am creating on click on that row and
showing modal popup. what i want is when the row is clicked , the ID for that row should be passed.
protected void grdOrderProduct_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='#ceedfc'");
e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=''");
e.Row.Attributes.Add("style", "cursor:pointer;");
e.Row.Attributes["onClick"] = Page.ClientScript.GetPostBackClientHyperlink(btnPop, "12");
}
}
How can i Get this "12" on my server control. i have put 12 as static for demo. but it will change.

you also can do like this
e.Row.Attributes["onclick"] = ClientScript.GetPostBackClientHyperlink
(this.GridView1, "Select$" + e.Row.RowIndex);

To know which row was clicked, you have to use the Row property of the GridViewRowEventArgs
protected void grdOrderProduct_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='#ceedfc'");
e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=''");
e.Row.Attributes.Add("style", "cursor:pointer;");
e.Row.Attributes["onClick"] = Page.ClientScript.GetPostBackClientHyperlink(btnPop, e.Row.RowIndex.ToString());
}
}
RowIndex would be passed as an argument to btnPop. In order to receive it btnPop should be implementing IPostBackEventHandler.
Like this:
public class MyControl : Button, IPostBackEventHandler
{
// Use the constructor to defined default label text.
public MyControl()
{
}
// Implement the RaisePostBackEvent method from the
// IPostBackEventHandler interface.
public void RaisePostBackEvent(string eventArgument)
{
//You receive the row number here.
}
}
Refer ClientScriptManager.GetPostBackClientHyperlink

dropdownlist in footer row of gridview being clear on postback

I am using a dropdownlist in footer row of gridview(ASP.Net) and I fill that on rowdatabound event,first time it works fine but when the form is postbacked,dropdown gets cleared.
It can be solved by refilling it on each postback,but I want that only single time code binding call fulfill my need,
means is there any way to stop from being null on postback.
looking for your kind solutions and suggestions
Thnx in advance......
Supriya
Code:
protected void gvProjects_RowDataBound(object sender, GridViewRowEventArgs e)
{
try
{
if (gvProjects.Rows.Count > 0 && e.Row.RowIndex != -1)
{
string proj_Id = Convert.ToString(gvProjects.DataKeys[e.Row.RowIndex].Value);
if (e.Row.RowType == DataControlRowType.DataRow)
{
DropDownList ddlProject = (DropDownList)e.Row.FindControl("ddlProject");
if (ddlProject != null && ddlProject.Items.Count == 0)
{
objMaster.FillProjects(ddlProject);
ddlProject.SelectedValue = proj_Id;
}
}
}
}
catch (Exception excep)
{
lbl_msg.Text = excep.Message;
}
}
It's called whenever the grid is binded,can it be avoided.

With this code you will avoid filling the dropdownlist located in the gridview footer in each rowdatabound:
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType != DataControlRowType.Footer)
{
//do the binding for the normal rows
}
}
As you can see, the rowdatabound will be only executed on the header and normal rows but not in the footer.
Hope this helps!

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
FillDropdown();
}
}

bind value to a Textbox in Gridview header

I am using a gridview in aspx page. I am adding Textboxes dynamically to the griview header. How can I insert a value to the textbox in the grid header.
My code goes like
protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.Header)
{
TextBox txtBox1 = default(TextBox);
for (int i = 0; i <= (e.Row.Cells.Count - 1); i++)
{
litHeader.Text = e.Row.Cells[i].Text + "<br/>";
e.Row.Cells[i].Controls.Add(litHeader);
e.Row.Cells[i].Controls.Add(txtBox1);
}
}
}
I am trying to bind a value to the textbox 'txtBox1' using the code
private void FillGridView()
{
TextBox txt;
txt = (TextBox)GridView1.HeaderRow.FindControl("txtBox1");
txt.Text = dtValues.Rows[0][5].ToString();
}
But I am not able to fill the textbox. Please help.

This may help someone on very old question. This how I update my header row text box immediately after I insert data to GV1. Hope it helps.
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
}
if (e.Row.RowType == DataControlRowType.Header)
{
//((TextBox)GridView1.HeaderRow.FindControl("tbProjNumInsert")).Text
if (newMaxNum != null && newMaxNum.Length > 0)
{
((TextBox)e.Row.Cells[4].FindControl("tbProjNumInsert")).Text = newMaxNum;
System.Diagnostics.Debug.WriteLine("GridView1_RowDataBound()...GridView1.Width !!!! " + ((TextBox)e.Row.Cells[4].FindControl("tbProjNumInsert")).Text + "........newMaxNum:" + newMaxNum);
}
}
}