Search for value in DataGridView in a column

Question

I want the user to be able to search for a number in a column in the DataGridView  dgv   The dgv can hold many records  Each record has a Project Number  So I want the user to be able to search for a project number in column Project Number  The columns I have are  ProjectID not visible   Image no headertext   Project Number  Project Name  Company  Contact   Here is my code   private void btnSearch Click object sender  EventArgs e        string searchValue   textBox1 Text      int rowIndex   -1       dgvProjects SelectionMode   DataGridViewSelectionMode FullRowSelect      try               foreach  DataGridViewRow row in dgvProjects Rows                        if  row Cells row Index  Value ToString   Equals searchValue                                 rowIndex   row Index                  dgvProjects Rows row Index  Selected   true                  break                                    catch  Exception exc                MessageBox Show exc Message             Problem  1  What it does so far  The user types the project number in TextBox1  When he she clicks the button  the code searches for this string in the rows  and when found the project number  that row gets selected  It works fine  but only once  When I want to search for an other project number  nothing happens   Problem  2  I think this can be done in a better way  by searching the values for column Project Name only  But how should I do this properly   The code I used to search comes from this answer

User · Answer

This is the exact code for search facility in datagridview  private void buttonSearch Click object sender  EventArgs e        string searchValue textBoxSearch Text      int rowIndex   1     this one is depending on the position of cell or column       string first row data dataGridView1 Rows 0  Cells 0  Value ToString          dataGridView1 SelectionMode   DataGridViewSelectionMode FullRowSelect      try               bool valueResulet   true          foreach  DataGridViewRow row in dataGridView1 Rows                        if  row Cells rowIndex  Value ToString   Equals searchValue                                 rowIndex   row Index                  dataGridView1 Rows rowIndex  Selected   true                  rowIndex                    valueResulet   false                                  if  valueResulet    false                        MessageBox Show  Record is not avalable for this Name  textBoxSearch Text  Not Found                return                      catch  Exception exc                MessageBox Show exc Message

User · Answer

MyTable  DefaultView RowFilter     LIKE       textBox1 Text          this dataGridView1 DataSource    MyTable  DefaultView    How  about the relation to the database connections and the Datatable  And how should i set the DefaultView correct   I use this code to get the data out   con   new System Data SqlServerCe SqlCeConnection    con ConnectionString    Data Source C   Users  mhadj  Documents  Visual Studio 2015  Projects  data base test 2  Sample sdf   con Open     DataTable dt   new DataTable     adapt   new System Data SqlServerCe SqlCeDataAdapter  select   from tbl Record   con           adapt Fill dt           dataGridView1 DataSource   dt  con Close

User · Answer

Filter the data directly from DataTable or Dataset    MyTable  DefaultView RowFilter     lt DataTable Field gt  LIKE       textBox1 Text            this dataGridView1 DataSource    MyTable  DefaultView    Use this code on event KeyUp of Textbox  replace  MyTable  for you table name or dataset  replace  for the field where you want make the search

User · Answer

It s better also to separate your logic in another method  or maybe in another class   This method will help you retreive the DataGridViewCell object in which the text was found            lt summary gt          Check if a given text exists in the given DataGridView at a given column index          lt  summary gt           lt param name  searchText  gt  lt  param gt           lt param name  dataGridView  gt  lt  param gt           lt param name  columnIndex  gt  lt  param gt           lt returns gt The cell in which the searchText was found lt  returns gt      private DataGridViewCell GetCellWhereTextExistsInGridView string searchText  DataGridView dataGridView  int columnIndex                DataGridViewCell cellWhereTextIsMet   null              For every row in the grid  obviously          foreach  DataGridViewRow row in dataGridView Rows                           I did not test this case  but cell Value is an object  and objects can be null                So check if the cell is null before using  ToString               if  row Cells columnIndex  Value    null  amp  amp  searchText    row Cells columnIndex  Value ToString                                     the searchText is equals to the text in this cell                  cellWhereTextIsMet   row Cells columnIndex                   break                                   return cellWhereTextIsMet             private void button click object sender  EventArgs e                DataGridViewCell cell   GetCellWhereTextExistsInGridView textBox1 Text  myGridView  2           if  cell    null                           Value exists in the grid                you can do extra stuff on the cell             cell Style   new DataGridViewCellStyle   ForeColor   Color Red                      else                          Value does not exist in the grid

User · Answer

Why don t you build a DataTable first then assign it to the DataGridView as DataSource   DataTable table4DataSource new DataTable     table4DataSource Columns Add  col00    table4DataSource Columns Add  col01    table4DataSource Columns Add  col02            add your rows  manually  in a circle or via a DataReader from a database table   assign the datasource   dtGrdViewGrid DataSource   table4DataSource    and then use    dtGrdViewGrid DataSource as DataTable  DefaultView RowFilter    col00        textBoxSearch Text       dtGrdViewGrid Refresh      You can even put this piece of code within your textbox textchange event and your filtered values will be showing as you write

User · Answer

Why you are using row Cells row Index   You need to specify index of column you want to search  Problem  2   For example  you need to change row Cells row Index  to row Cells 2  where 2 is index of your column   private void btnSearch Click object sender  EventArgs e        string searchValue   textBox1 Text       dgvProjects SelectionMode   DataGridViewSelectionMode FullRowSelect      try               foreach  DataGridViewRow row in dgvProjects Rows                        if  row Cells 2  Value ToString   Equals searchValue                                 row Selected   true                  break                                    catch  Exception exc                MessageBox Show exc Message

[c#] Search for value in DataGridView in a column

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