I can edit single row in the GridView.
But when in MySQL database the value of field "card" is not null I need stopping the edit in this single row of GridView (and passed the row in closed state).
I tried this solution, but in GridView I've all rows of GridView in "closed state" even when the value of field "card" is null, why?
The condition is inserted in RowDataBound event, it's correct?
My code below.
I would greatly appreciate any help you can give me in working this problem.
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
var obj = ((DataRowView)e.Row.DataItem)["card"];
ImageButton edit = (ImageButton)e.Row.FindControl("imgbtnEdit");
if (obj != null)
{
edit.Enabled = false;
edit.ToolTip = "Closed state";
}
}
if (e.Row.RowType == DataControlRowType.Pager)
{
DropDownList ddl = (DropDownList)(e.Row.FindControl("ddlpages"));
Label lblPageCount = (Label)e.Row.FindControl("lblPageCount");
if (lblPageCount != null)
lblPageCount.Text = GridView1.PageCount.ToString();
for (int i = 1; i <= GridView1.PageCount; i++)
{
ddl.Items.Add(i.ToString());
}
ddl.SelectedIndex = GridView1.PageIndex;
if (GridView1.PageIndex == 0)
{
((ImageButton)e.Row.FindControl("ImageButton1")).Visible = false;
((ImageButton)e.Row.FindControl("ImageButton2")).Visible = false;
}
if (GridView1.PageIndex + 1 == GridView1.PageCount)
{
((ImageButton)e.Row.FindControl("ImageButton3")).Visible = false;
((ImageButton)e.Row.FindControl("ImageButton4")).Visible = false;
}
}
}
This is because DBNull.Value and null are two different things.
var obj = ((DataRowView)e.Row.DataItem)["card"];
if (!DBNull.Value.Equals(obj))
{
edit.Enabled = false;
edit.ToolTip = "Closed state";
}
This will check to see if the "card" value is a null database value, rather than a null object.
Related
Can please any one help me on this. I have developed a c# windows application which has DataGridView first column has checkboxes. if I click on first column header it selects all the row level check boxes except the first row. For selecting all row level check boxes I have an event of dataGridView1_ColumnHeaderMouseClick and the code is:
private void dataGridView1_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
foreach (DataGridViewColumn column in dataGridView1.Columns)
{
column.SortMode = DataGridViewColumnSortMode.NotSortable;
}
if (e.ColumnIndex == 0)
{
if (chek == 0)
{
try
{
for (int i = 0; i < dataGridView1.RowCount; i++)
{
string paymentValue = dataGridView1.Rows[i].Cells[18].Value.ToString();
string incmngp = dataGridView1.Rows[i].Cells[20].Value.ToString();
if (paymentValue == "N" && incmngp =="")
{
dataGridView1.Rows[i].Cells[0].Value = 1;
chek = 1;
}
}
if (chek == 1)
{
btn_update.Text = "Update";
}
}
catch (Exception ) { }
}
else if(chek==1)
{
try
{
for (int i = 0; i < dataGridView1.RowCount; i++)
{
dataGridView1.Rows[i].Cells[0].Value = 0;
chek = 0;
}
if (chek == 0)
{
btn_update.Text = "OK";
}
}
catch (Exception) { }
}
}
Note: chek is the variable declared on initialize stage
Set your Selection mode property of data grid view to ColumnHeaderSelect
and make sure all your 'Text' columns have SortMode set to NotSortable
UPDATE 2
In which case, Undo everything I ever told before and do that like this
Before you are assigning any DataTable to dataGridView1.
da.Fill(dt);
dataGridView1.DataSource = dt.DefaultView;
dataGridView1.SelectionMode = DataGridViewSelectionMode.RowHeaderSelect;
foreach(DataGridViewColumn dc in dataGridView1.Columns)
{
dc.SortMode = DataGridViewColumnSortMode.NotSortable;
}
dataGridView1.SelectionMode = DataGridViewSelectionMode.ColumnHeaderSelect;
UPDATE 3
Add an event handler for your dataGridView1's ColumnHeaderMouseClick Event
like below
Add the below code (Generic code if you want to use the same functionality for any column of check boxes)
private void dataGridView1_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
//Enter your own column index here
if(e.ColumnIndex == 0)
foreach(DataGridViewRow row in dataGridView1.Rows)
foreach (DataGridViewCell cell in row.Cells)
{
//Check if the cell type is of a CheckBoxCell
if (cell.GetType() == typeof(DataGridViewCheckBoxCell))
{
DataGridViewCheckBoxCell c = (DataGridViewCheckBoxCell)cell;
c.TrueValue = "T";
c.FalseValue = "F";
if (c.Value == c.FalseValue|| c.Value == null )
c.Value = c.TrueValue;
else
c.Value = c.FalseValue;
}
}
dataGridView1.RefreshEdit();
}
This is a very bizarre bug in Winforms. The problem more generally applies not to the first row, but to the first selected cell in any row of DataGridViewCheckBoxCell(s). You can select the CheckBox cell by clicking on the check box, or select the cell outside the check box, the behavior is the same. If you select 3 check boxes in the middle of your grid, the first of those three will freeze and not update properly. If you try to clear the selection in code, with a dataGridView1.ClearSelection() method call, it still does not work.
The correct answer is to call datagridview1.RefreshEdit() right after you change the checkbox data. You can't just call it after all changes are made. It must be made for each change in the CheckBox value.
foreach (DataGridViewRow row in Results.Rows)
{
var ck = (DataGridViewCheckBoxCell) row.Cells["check"];
ck.Value = ck.TrueValue;
Results.RefreshEdit();
}
I have a function:
private void ds_ItemBound(object sender, DataGridItemEventArgs e)
{
if (e.Item.ItemIndex >= 0)
{
e.Item.Cells[0].Controls.Add(Utility.GetImage("Delegate"));
e.Item.Attributes.Add("Description", ((System.Data.DataRowView)(e.Item.DataItem)).Row["DelegateDescription"].ToString());
string DelegateName = ((System.Data.DataRowView)(e.Item.DataItem)).Row["DelegateName"].ToString();
e.Item.Attributes.Add("DelegateName", ((System.Data.DataRowView)(e.Item.DataItem)).Row["DelegateName"].ToString());
((System.Web.UI.WebControls.CheckBox)(e.Item.Cells[3].Controls[0])).Checked = false;
if (hDelegates.Value != "")
{
string[] selectedDelegates = hDelegates.Value.Split(new char[] { ',' });
foreach (string delegate in selectedDelegates)
{
if (delegate.Equals(delegateName))
{
count++;
((System.Web.UI.WebControls.CheckBox)(e.Item.Cells[3].Controls[0])).Checked = true;
break;
}
}
}
}
if (count == dDelegates.Items.Count)
lblEditCheck.Checked = true;
else
lblEditCheck.Checked = false;
}
The UI has a table with each row corresponding to one entry. So, each row has an image, a description, a name.
I am getting an exception in the code at line:
((System.Web.UI.WebControls.CheckBox)(e.Item.Cells[3].Controls[0])).Checked = false;
The exception is : Unable to cast object of type 'System.Web.UI.LiteralControl' to type 'System.Web.UI.WebControls.CheckBox'.
Further, e.Item.Cells[3].Controls[0] is System.Web.UI.LiteralControl .
And the the check box markup looks like <asp:CheckBox ID="lblEditCheck" runat="server" TabIndex="0" Width="30px" CssClass="ColumnHeader" /></td>
I am stuck on getting this to work for a few days now. Please let me know if any more info will be useful.
Thanks a lot for your help.
What didn't work:
var checkbox = (System.Web.UI.WebControls.CheckBox)e.Item.FindControl("lblEditCheck");
checkbox.Checked = false;
In this case checkbox is null. And the corresponding exception is thrown.
Use IDs of the controls which you want to get and use the FindControl to get the CheckBox. Also use the ListViewItemType.DataItem for data rows as you will get the null for non DataItem rows.
if (e.Item.ItemType == ListViewItemType.DataItem)
{
((System.Web.UI.WebControls.CheckBox)(e.Item.FindControl("lblEditCheck")).Checked = false;
}
If you expect the some of row may not have the checkbox control then you can first get the checkbox and then change it Changed status.
CheckBox lblEditCheck = e.Item.FindControl("lblEditCheck") as CheckBox;
if(lblEditCheck != null)
lblEditCheck.Checked = false;
I have 2 gridControl and I wanna change background of cells (rows) that different between 2 gridControl with primary key is multiple field set by user.
Any solution for this problem?
See this example image
In this two query, key field is col1, col2, col3 and col4. Different in col6 and I want to highlight cell that have different value.
This is my current code for RowCellStyle event
private void gvQuery1_RowCellStyle(object sender, RowCellStyleEventArgs e)
{
if (gcQuery2.DataSource == null || lsKey == null || lsKey.Count <= 0)
return;
List<object> id = new List<object>();
foreach (KeyObject key in lsKey)
{
id.Add((sender as GridView).GetRowCellValue(e.RowHandle, key.key1[1].ToString()));
}
for (int i = 0; i < gvQuery2.RowCount; i++)
{
int rowHandle = gvQuery2.GetVisibleRowHandle(i);
bool flgEqual = true;
for (int j = 0; j < lsKey.Count; j++)
{
object v = gvQuery2.GetRowCellValue(rowHandle, gvQuery2.VisibleColumns[int.Parse(lsKey[j].key2[0].ToString())]);
if (id[j] == null && v == null)
continue;
if (!id[j].GetType().Equals(v.GetType()) || !id[j].ToString().Equals(v.ToString()))
{
flgEqual = false;
break;
}
}
if (flgEqual)
{
for (int k = 0; k < (sender as GridView).Columns.Count; k++)
{
if (!(sender as GridView).GetRowCellValue(e.RowHandle, (sender as GridView).Columns[k].FieldName).ToString()
.Equals(gvQuery2.GetRowCellValue(rowHandle, (sender as GridView).Columns[k].FieldName).ToString()))
{
if (e.Column.FieldName.Equals((sender as GridView).Columns[k].FieldName))
e.Appearance.BackColor = Color.Orange;
}
}
break;
}
}
}
Refer this: Customizing Appearances of Individual Rows and Cells
You can implement your functionality using the
GridView.RowCellStyle event. This event is fired for each cell in
a Grid View and thus it has Column and RowHandle parameters
that identify the cell being painted.
I assume that you have fixed number of records in both grid and also the order of the records are same. Then you can try to user same row handle to access the value from the both grid's MainView at RowCellStyle event as below:
using DevExpress.XtraGrid.Views.Grid;
// ...
private void gridView1_RowCellStyle(object sender, RowCellStyleEventArgs e) {
GridView View = sender as GridView;
GridView leftGridView = leftGrid.MainView as GridView; //It is up to you that which viewtype you have used.
if(e.Column.FieldName == "Col5") {
string srcVal= View.GetRowCellDisplayText(e.RowHandle, View.Columns["Col5"]); // You can use GetRowCellValue() method also to get the value from the cell.
string leftGridVal= leftGridView .GetRowCellDisplayText(e.RowHandle, leftGridView .Columns["Col5"]);
if(srcVal != leftGridVal) {
e.Appearance.BackColor = Color.DeepSkyBlue;
e.Appearance.BackColor2 = Color.LightCyan;
}
}
}
Above code snippet is just like a sudo code to direct you to implement the functionality.. Handle this event on that Grid on which you want to color.. Remember to take care about the RowHandle, you have take care about the row index.
Hope this help..
Use the GridView.RowCellStyle event, which enables appearance settings of individual cells to be changed
Please refer this site for your reference
https://www.devexpress.com/Support/Center/Question/Details/Q520842
void gridView1_RowCellStyle(object sender, RowCellStyleEventArgs e)
{
GridView currentView = sender as GridView;
if (e.Column.FieldName == "Customer")
{
bool value = Convert.ToBoolean(currentView.GetRowCellValue(e.RowHandle, "Flag_Customer"));
if (value)
e.Appearance.BackColor = Color.Red;
}
if (e.Column.FieldName == "Vendor")
{
bool value = Convert.ToBoolean(currentView.GetRowCellValue(e.RowHandle, "Flat_Vendor"));
if (value)
e.Appearance.BackColor = Color.Red;
}
}
I have a drop down list "ddlMitchelLandscape2" ,when add button triggers ,i add the selected item value in to gridview.
I am stuck here ,how to check the gridview, before add the value to grid view. The selected item is already exist in grid view or not when the add button is triggered .
Some one help me how to check the value is exist in gridview before add it to gird view please ?
protected void btnAddMitchellLandscape_Click(object sender, EventArgs e)
{
//validate to make sure Mitchell Landscape is entered
if (!ValidateMitchellPage())
return;
Assessment objAssessment = (Assessment)Session[Session_CurrentAssessment];
if (ddlMitchelLandscape2.GetSelectedItemValue > 0)
{
if (lblMitchellID.Text == string.Empty)
{
//add
AssessmentEntity objAssessmentEntity = new AssessmentEntity();
Assessment.tblMitchellLandscapeIDRow row =
objAssessment.tblMitchellLandscapeID.NewtblMitchellLandscapeIDRow();
row.MitchellLandscapeID = ddlMitchelLandscape2.GetSelectedItemValue;
row.MitchellLandscapeName = ddlMitchelLandscape2.GetSelectedItemText;
}
else
{
//Add button not visible when its not a new row
ctrlHeader.ShowError("Error: Unknown error");
return;
}
//refresh data bound table
PopulateMitchellDetailsToForm(ref objAssessment);
//clear after save
btnClearMitchellLandscape_Click(null, null);
}
}
ValidateMitchellPage()
private bool ValidateMitchellPage()
{
litMitchellError.Text = string.Empty;
if (ddlMitchelLandscape2.GetSelectedItemValue <= 0)
litMitchellError.Text = "Please select Mitchell Landscape";
if (litMitchellError.Text.Trim() == string.Empty)
{
litMitchellError.Visible = false;
return true;
}
litMitchellError.Visible = true;
return false;
}
DataBind to grid view
private void PopulateMitchellDetailsToForm(ref Assessment objAssessment)
{
Assessment.tblMitchellLandscapeIDRow[] MlData
= (Assessment.tblMitchellLandscapeIDRow[])objAssessment.tblMitchellLandscapeID.Select("SaveType <> " + Convert.ToString((int)EnumCollection.SaveType.RemoveOnly));
this.gvMitchellLandscape.DataSource = MlData;
this.gvMitchellLandscape.DataBind();
}
You have to check the selected value from the dropdown or combobox in gridview by checking each row.
You can use following code to get row of gridview.
bool isValueExist=False;
for (int i = 0; i < gridview.Rows.Count; i++)
{
String val = gridview.Rows[i].Cells[0].Value.ToString();
if(val == your_drop_down_value)
{
isValueExist=True;
break;
}
}
You have to change the cell number according to your gridview design.
I have a cascading dropdownlist inside a gridview which contains 5 columns which are ItemsType, ItemList, UnitPrice, Quantity and Total. Selecting ItemsType in 1st dropdownlist will populate items in 2nd dropdownlist i.e. ItemList which is bound to database.
Problem that I am getting is that when I click Edit button, items in 2nd dropdownlist Itemstype isn't selected though I have assigned the selectedValue.
When I ran the webform in debugging mode I saw that though value has been rightly assigned to dropdownlist.selectedvalue, it isn't accepting the value at all.
The weird thing is that when I click the edit button for the second time after 1st debug, items in dropdownlist are selected correctly.
I have used the following
ddlCarriedItems.SelectedValue = SValue;
Though SValue has values of itemlist, SelectedValue displays none.
Here's the code.
protected void btnEdit_Click(object sender, EventArgs e)
{
try
{
Button btn = (Button)sender;
GridViewRow gv = (GridViewRow)btn.NamingContainer;
string VRM_id = gv.Cells[0].Text;
dc.Company_code = Convert.ToInt32(Session["company_code"].ToString());
dc.Vrm_id = Convert.ToInt32(VRM_id);
DataTable dtVRM_CP = vrmbll.edit_VRM_carried_products(dc);
int rowIndex = 0;
if (dtVRM_CP.Rows.Count > 0)
{
for (int i = 0; i < dtVRM_CP.Rows.Count; i++)
{
DropDownList ddlItemsType = (DropDownList)gvCarriedItems.Rows[rowIndex].Cells[1].FindControl("ddlItemsType");
DropDownList ddlCarriedItems = (DropDownList)gvCarriedItems.Rows[rowIndex].Cells[2].FindControl("ddlCarriedItems");
TextBox txtItemPrice = (TextBox)gvCarriedItems.Rows[rowIndex].Cells[3].FindControl("txtItemPrice");
TextBox txtItemQty = (TextBox)gvCarriedItems.Rows[rowIndex].Cells[4].FindControl("txtItemQty");
TextBox txtItemTotal = (TextBox)gvCarriedItems.Rows[rowIndex].Cells[5].FindControl("txtItemTotal");
ddlItemsType.SelectedIndex = Convert.ToInt32((dtVRM_CP.Rows[i]["items_type"]).ToString());
int itemstype = ddlItemsType.SelectedIndex;
string SValue = dtVRM_CP.Rows[i]["items"].ToString();
if (itemstype == 1)
{
ddlCarriedItems.SelectedValue =SValue;
}
else if (itemstype == 2)
{
ddlCarriedItems.SelectedValue = SValue;
}
else if (itemstype == 3)
{
ddlCarriedItems.SelectedValue = SValue;
}
else
{ }
txtItemPrice.Text = dtVRM_CP.Rows[i]["items_price"].ToString();
txtItemQty.Text = dtVRM_CP.Rows[i]["items_qty"].ToString();
txtItemTotal.Text = dtVRM_CP.Rows[i]["items_total"].ToString();
if (i != (dtVRM_CP.Rows.Count) - 1 && gvCarriedItems.Rows.Count != (dtVRM_CP.Rows.Count))
{
AddNewRow();
}
rowIndex++;
}
}
}
catch
{ }
}
Ok I've found the problem in my code. The thing is that I had to bind dropdownlist everytime before assigning value to ddlCarriedItems.SelectedValue.
I modified my code as following as per #king.code suggestion:
if (itemstype == 1)
{
DataTable dt = vrmbll.select_raw_materials_production(dc);
ddlCarriedItems.DataSource = dt;
ddlCarriedItems.DataValueField = "ID";
ddlCarriedItems.DataTextField = "Name";
ddlCarriedItems.DataBind();
ddlCarriedItems.Items.Insert(0, new ListItem("----- Select -----", "-1"));
ddlCarriedItems.SelectedValue = SValue;
}
But I have no idea why the previous code worked when I ran debugging for 2nd time.