Passing in Read-Only parameters to the Reporting Services Web Service
Just a quick one – I have recently been generating dynamic RDL’s and then using the Reporting Services Web Service to load and render the reports. One little headache I did have was defining the parameters for the reports using the SetExecutionParameters method. One of my parameters is read-only and as such when I tried to pass it to the report I got a nice error back informing me of this.
I spent some time looking around to determine how I pass a read only parameter to a report without any luck. Then it dawned on me . . . just don’t add the parameter to the prameter array . . . and make sure you reduce the array size by one. So my code now loooks like this;
ReportExecutionWS.ParameterValue[] parameters = new ReportExecutionWS.ParameterValue[3];
parameters[0] = new ReportExecutionWS.ParameterValue();
parameters[0].Name = "Version";
parameters[0].Value = "1.0.0";
parameters[1] = new ReportExecutionWS.ParameterValue();
parameters[1].Name = "ReportDate";
parameters[1].Value = System.DateTime.Now.AddHours(-6).ToString();
parameters[2] = new ReportExecutionWS.ParameterValue();
parameters[2].Name = "Resolution";
parameters[2].Value = "180";
// We dont need to pass read-only parameters!!!
//parameters[3] = new ReportExecutionWS.ParameterValue();
//parameters[3].Name = "ParentId";
//parameters[3].Value = string.Empty;
parameters[0] = new ReportExecutionWS.ParameterValue();
parameters[0].Name = "Version";
parameters[0].Value = "1.0.0";
parameters[1] = new ReportExecutionWS.ParameterValue();
parameters[1].Name = "ReportDate";
parameters[1].Value = System.DateTime.Now.AddHours(-6).ToString();
parameters[2] = new ReportExecutionWS.ParameterValue();
parameters[2].Name = "Resolution";
parameters[2].Value = "180";
// We dont need to pass read-only parameters!!!
//parameters[3] = new ReportExecutionWS.ParameterValue();
//parameters[3].Name = "ParentId";
//parameters[3].Value = string.Empty;
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