Question about SizeDataGridColumnToContent function...

R

rhaazy

Using C#

string xmlfile = "appsettings.xml";
DataSet ds_login = new DataSet();
ds_login.ReadXml(xmlfile);
dgConnection.DataSource = ds_login;
dgConnection.DataMember = "Connection";
SizeDataGridColumnsToContent(dgConnection, 1);


The function works the way it is suppose to for every other datagrid I
have.
But for the one bound to the dataset with the XML I get an extra column

added.


the column is Connections_Id where Connections is an element name...


The column DOES NOT show up if I don't use the
SizeDataGridColumnsToContent function.


here is the function:
public void SizeDataGridColumnsToContent(DataGrid dataGrid, int
nRowsToScan)
{
//first check to make sure the DataGrid has a
valid datasource
if (dataGrid.DataSource == null)
{
//it does not
return;
}


// Create graphics object for measuring widths.

Graphics Graphics = dataGrid.CreateGraphics();


// Define new table style.
DataGridTableStyle tableStyle;


//necessary b/c of the DataSet looping
int nRowsToScanOriginal = nRowsToScan;
bool scanAllRows;
if(-1 == nRowsToScan)
scanAllRows = true;
else
scanAllRows = false;


try
{
if (dataGrid.DataSource.GetType() ==
typeof(DataSet))
{
DataSet dataSet =
(DataSet)dataGrid.DataSource;
if(dataSet.Tables.Count == 0)
{
//if the DataSet it
empty, nothing to do
return;
}
// Clear any existing table
styles.
dataGrid.TableStyles.Clear();
foreach(DataTable dataTable in
dataSet.Tables)
{
if (scanAllRows)
{
nRowsToScan =
dataTable.Rows.Count;
}
else
{
// Can only
scan rows if they exist.
nRowsToScan =
System.Math.Min(nRowsToScanOriginal,

dataTable.Rows.Count);
}


// Use mapping name
that is defined in the data source.
tableStyle = new
DataGridTableStyle();
tableStyle.MappingName
= dataTable.TableName;


// Now create the
column styles within the table style.
DataGridTextBoxColumn
columnStyle;
int iWidth;


for (int iCurrCol = 0;
iCurrCol <
dataTable.Columns.Count; iCurrCol++)
{
DataColumn
dataColumn = dataTable.Columns[iCurrCol];


columnStyle =
new DataGridTextBoxColumn();



columnStyle.TextBox.Enabled = true;

if(dataColumn.Caption != "")
{

columnStyle.HeaderText = dataColumn.Caption;
}
else
{

columnStyle.HeaderText = dataColumn.Caption;
}

columnStyle.MappingName = dataColumn.ColumnName;


// Set width to
header text width.
iWidth =
(int)(Graphics.MeasureString

(columnStyle.HeaderText,

dataGrid.Font).Width);


// Change
width, if data width is
// wider than
header text width.
// Check the
width of the data in the first X rows.
DataRow
dataRow;
for (int iRow =
0; iRow < nRowsToScan; iRow++)
{
dataRow
= dataTable.Rows[iRow];


if
(null != dataRow[dataColumn.ColumnName])
{

int iColWidth = (int)(Graphics.MeasureString

(dataRow.ItemArray[iCurrCol].ToString(),

dataGrid.Font).Width);

iWidth = (int)System.Math.Max(iWidth, iColWidth);
}
}

columnStyle.Width = iWidth + 4;


// Add the new
column style to the table style.

tableStyle.GridColumnStyles.Add(columnStyle);
}
// Add the new table
style to the data grid.

dataGrid.TableStyles.Add(tableStyle);
}
}
else if(dataGrid.DataSource.GetType()
== typeof(DataTable)) //the
datagrid just has a DataTable
{
tableStyle = new
DataGridTableStyle();
DataTable dataTable =
(DataTable)dataGrid.DataSource;


if (-1 == nRowsToScan)
{
nRowsToScan =
dataTable.Rows.Count;
}
else
{
// Can only scan rows
if they exist.
nRowsToScan =
System.Math.Min(nRowsToScan,

dataTable.Rows.Count);
}


// Clear any existing table
styles.
dataGrid.TableStyles.Clear();


// Use mapping name that is
defined in the data source.
tableStyle.MappingName =
dataTable.TableName;


// Now create the column styles
within the table style.
DataGridTextBoxColumn
columnStyle;
int iWidth;


for (int iCurrCol = 0;
iCurrCol <
dataTable.Columns.Count; iCurrCol++)
{
DataColumn dataColumn =
dataTable.Columns[iCurrCol];


columnStyle = new
DataGridTextBoxColumn();



columnStyle.TextBox.Enabled = true;
if(dataColumn.Caption
!= "")
{

columnStyle.HeaderText = dataColumn.Caption;
}
else
{

columnStyle.HeaderText = dataColumn.ColumnName;
}
columnStyle.MappingName
= dataColumn.ColumnName;


// Set width to header
text width.
iWidth =
(int)(Graphics.MeasureString

(columnStyle.HeaderText,

dataGrid.Font).Width);


// Change width, if
data width is
// wider than header
text width.
// Check the width of
the data in the first X rows.
DataRow dataRow;
for (int iRow = 0; iRow
< nRowsToScan; iRow++)
{
dataRow =
dataTable.Rows[iRow];


if (null !=
dataRow[dataColumn.ColumnName])
{
int
iColWidth = (int)(Graphics.MeasureString

(dataRow.ItemArray[iCurrCol].ToString(),

dataGrid.Font).Width);
iWidth
= (int)System.Math.Max(iWidth, iColWidth);
}
}
columnStyle.Width =
iWidth + 4;


// Add the new column
style to the table style.

tableStyle.GridColumnStyles.Add(columnStyle);
}
// Add the new table style to
the data grid.

dataGrid.TableStyles.Add(tableStyle);
}
}
catch(Exception e)
{
MessageBox.Show(e.Message);
}
finally
{
Graphics.Dispose();
}


}


Here is the XML file also if that helps...

<?xml version="1.0" encoding="utf-8" ?>
- <AppSettings>
- <DatebaseConnections>
- <Connection>
<Server>DSS-SERVER3</Server>
<Database>ClientScanTest</Database>
</Connection>
</DatebaseConnections>
- <LoginSettings>
<Admin>GaKFQUS2Oo92F6byJQGbEg==</Admin>
</LoginSettings>
</AppSettings>


This is the Output also...

Server Database DatabaseConnections_Id
DSS-SERVER3 ClientScantest 0

as seen in the datagrid the dataset is bound to.
 
R

rhaazy

rhaazy said:
Using C#

string xmlfile = "appsettings.xml";
DataSet ds_login = new DataSet();
ds_login.ReadXml(xmlfile);
dgConnection.DataSource = ds_login;
dgConnection.DataMember = "Connection";
SizeDataGridColumnsToContent(dgConnection, 1);


The function works the way it is suppose to for every other datagrid I
have.
But for the one bound to the dataset with the XML I get an extra column

added.


the column is Connections_Id where Connections is an element name...


The column DOES NOT show up if I don't use the
SizeDataGridColumnsToContent function.


here is the function:
public void SizeDataGridColumnsToContent(DataGrid dataGrid, int
nRowsToScan)
{
//first check to make sure the DataGrid has a
valid datasource
if (dataGrid.DataSource == null)
{
//it does not
return;
}


// Create graphics object for measuring widths.

Graphics Graphics = dataGrid.CreateGraphics();


// Define new table style.
DataGridTableStyle tableStyle;


//necessary b/c of the DataSet looping
int nRowsToScanOriginal = nRowsToScan;
bool scanAllRows;
if(-1 == nRowsToScan)
scanAllRows = true;
else
scanAllRows = false;


try
{
if (dataGrid.DataSource.GetType() ==
typeof(DataSet))
{
DataSet dataSet =
(DataSet)dataGrid.DataSource;
if(dataSet.Tables.Count == 0)
{
//if the DataSet it
empty, nothing to do
return;
}
// Clear any existing table
styles.
dataGrid.TableStyles.Clear();
foreach(DataTable dataTable in
dataSet.Tables)
{
if (scanAllRows)
{
nRowsToScan =
dataTable.Rows.Count;
}
else
{
// Can only
scan rows if they exist.
nRowsToScan =
System.Math.Min(nRowsToScanOriginal,

dataTable.Rows.Count);
}


// Use mapping name
that is defined in the data source.
tableStyle = new
DataGridTableStyle();
tableStyle.MappingName
= dataTable.TableName;


// Now create the
column styles within the table style.
DataGridTextBoxColumn
columnStyle;
int iWidth;


for (int iCurrCol = 0;
iCurrCol <
dataTable.Columns.Count; iCurrCol++)
{
DataColumn
dataColumn = dataTable.Columns[iCurrCol];


columnStyle =
new DataGridTextBoxColumn();



columnStyle.TextBox.Enabled = true;

if(dataColumn.Caption != "")
{

columnStyle.HeaderText = dataColumn.Caption;
}
else
{

columnStyle.HeaderText = dataColumn.Caption;
}

columnStyle.MappingName = dataColumn.ColumnName;


// Set width to
header text width.
iWidth =
(int)(Graphics.MeasureString

(columnStyle.HeaderText,

dataGrid.Font).Width);


// Change
width, if data width is
// wider than
header text width.
// Check the
width of the data in the first X rows.
DataRow
dataRow;
for (int iRow =
0; iRow < nRowsToScan; iRow++)
{
dataRow
= dataTable.Rows[iRow];


if
(null != dataRow[dataColumn.ColumnName])
{

int iColWidth = (int)(Graphics.MeasureString

(dataRow.ItemArray[iCurrCol].ToString(),

dataGrid.Font).Width);

iWidth = (int)System.Math.Max(iWidth, iColWidth);
}
}

columnStyle.Width = iWidth + 4;


// Add the new
column style to the table style.

tableStyle.GridColumnStyles.Add(columnStyle);
}
// Add the new table
style to the data grid.

dataGrid.TableStyles.Add(tableStyle);
}
}
else if(dataGrid.DataSource.GetType()
== typeof(DataTable)) //the
datagrid just has a DataTable
{
tableStyle = new
DataGridTableStyle();
DataTable dataTable =
(DataTable)dataGrid.DataSource;


if (-1 == nRowsToScan)
{
nRowsToScan =
dataTable.Rows.Count;
}
else
{
// Can only scan rows
if they exist.
nRowsToScan =
System.Math.Min(nRowsToScan,

dataTable.Rows.Count);
}


// Clear any existing table
styles.
dataGrid.TableStyles.Clear();


// Use mapping name that is
defined in the data source.
tableStyle.MappingName =
dataTable.TableName;


// Now create the column styles
within the table style.
DataGridTextBoxColumn
columnStyle;
int iWidth;


for (int iCurrCol = 0;
iCurrCol <
dataTable.Columns.Count; iCurrCol++)
{
DataColumn dataColumn =
dataTable.Columns[iCurrCol];


columnStyle = new
DataGridTextBoxColumn();



columnStyle.TextBox.Enabled = true;
if(dataColumn.Caption
!= "")
{

columnStyle.HeaderText = dataColumn.Caption;
}
else
{

columnStyle.HeaderText = dataColumn.ColumnName;
}
columnStyle.MappingName
= dataColumn.ColumnName;


// Set width to header
text width.
iWidth =
(int)(Graphics.MeasureString

(columnStyle.HeaderText,

dataGrid.Font).Width);


// Change width, if
data width is
// wider than header
text width.
// Check the width of
the data in the first X rows.
DataRow dataRow;
for (int iRow = 0; iRow
< nRowsToScan; iRow++)
{
dataRow =
dataTable.Rows[iRow];


if (null !=
dataRow[dataColumn.ColumnName])
{
int
iColWidth = (int)(Graphics.MeasureString

(dataRow.ItemArray[iCurrCol].ToString(),

dataGrid.Font).Width);
iWidth
= (int)System.Math.Max(iWidth, iColWidth);
}
}
columnStyle.Width =
iWidth + 4;


// Add the new column
style to the table style.

tableStyle.GridColumnStyles.Add(columnStyle);
}
// Add the new table style to
the data grid.

dataGrid.TableStyles.Add(tableStyle);
}
}
catch(Exception e)
{
MessageBox.Show(e.Message);
}
finally
{
Graphics.Dispose();
}


}


Here is the XML file also if that helps...

<?xml version="1.0" encoding="utf-8" ?>
- <AppSettings>
- <DatebaseConnections>
- <Connection>
<Server>DSS-SERVER3</Server>
<Database>ClientScanTest</Database>
</Connection>
</DatebaseConnections>
- <LoginSettings>
<Admin>GaKFQUS2Oo92F6byJQGbEg==</Admin>
</LoginSettings>
</AppSettings>


This is the Output also...

Server Database DatabaseConnections_Id
DSS-SERVER3 ClientScantest 0

as seen in the datagrid the dataset is bound to.
Click to expand...
 

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